This is a list of recreational caving fatalities in the United Kingdom. It includes all verified deaths associated with the exploration of natural caves and disused mines in the modern era (post 1880). Deaths involving members of the general public who may have slipped down a shaft, or wandered into a cave without being aware of the risks, have been excluded.
Caving cannot be considered a particularly dangerous pastime. In 2018, there were up to 4,000 regular cavers in the UK, and about 70,000 people who went on instructor-led courses into caves in the Yorkshire Dales, but there were no fatalities. [1]
The following is a list of the 138 identified recorded fatalities associated with recreational caving in the UK. The main causes of death have been drowning when cave diving, drowning as the result of flooding or negotiating deep water, injuries incurred from falling from a height, and injuries incurred as the result of rock falls. In ten cases the bodies have not been recovered.
The worst incident in UK caving history was the Mossdale Caverns incident in 1967 when six cavers drowned following an unexpected cloudburst. [2] There have been three incidents when three people have died. The first was when three cavers drowned in Langstroth Pot in 1976 when free-diving short sections of underwater passage as the result of the air in an air bell becoming foul. [3] Three cavers were killed by a rock fall in Ease Gill Caverns in 1988, [4] and three cavers drowned in the Marble Arch system in 1995. [5]
Porth yr Ogof, in South Wales, accounts for eleven fatalities, nine of which were the result of people drowning when negotiating the exit pool. [6] Ease Gill Caverns and its associated entrances account for ten deaths; Alum Pot and its associated entrances account for eight; and Mossdale Caverns accounts for six, all from the 1967 incident.
The only case of a caver dying in the UK as the result of becoming stuck was Neil Moss in Peak Cavern in 1959. The cause of death was foul air building up around him. [7]
Date | Cave | Area | Cause | Name | Notes |
---|---|---|---|---|---|
Sept 1909 | Square Shaft, Alderley Edge | Peak District | Fall | Alexander Rea | 17-year-old boy on school outing [8] [9] |
May 1929 | West Mine, Alderley Edge | Peak District | Hypothermia | George Etchells Alfred Hadfield | Bodies found 7 September 1929 [10] [11] |
July 1936 | Alum Pot | Yorkshire Dales | Rock fall | Mabel Binks | Possibly hit by a rock deliberately thrown down the shaft [12] [13] |
May 1939 | Rowten Pot | Yorkshire Dales | Drowned | John Lambert | Fell and subsequently drowned [14] [15] |
March 1946 | West Mine, Alderley Edge | Peak District | Fall | Arthur Murray | [16] |
Dec 1946 | Grange Rigg Pot | Yorkshire Dales | Hypothermia | Harold Sargeant | Died following a fall [17] [18] |
May 1948 | West Mine, Alderley Edge | Peak District | Fall | Leslie Hunt | 13-year-old schoolboy [19] |
Apr 1949 | Wookey Hole | Mendip | Diving | Gordon Marriott | [20] |
May 1951 | Penyghent Pot | Yorkshire Dales | Hypothermia | John Williams | [21] |
Oct 1954 | West Mine, Alderley Edge | Peak District | Fall | Kenneth John Booth | 16-year-old schoolboy [22] |
May 1955 | Alum Pot | Yorkshire Dales | Fall | John Edgar Fisher | Fell from near top of Dolly Tubs pitch when unlifelined [23] [24] |
Jun 1957 | Porth yr Ogof | South Wales | Drowned | Leonard Garraway | [25] [26] |
Jan 1958 | Goyden Pot | Yorkshire Dales | Drowned | Brian Kerr | Body not recovered [27] [28] |
Jan 1959 | Swildon's Hole | Mendip | Hypothermia | John Wallington | [29] [30] |
Mar 1959 | Peak Cavern | Peak District | Asphyxia | Neil Moss | Result of being trapped in confined space. Body interred in situ [31] |
July 1959 | Dow Cave | Yorkshire Dales | Rock fall | David Priestman | [32] |
Dec 1959 | Bar Pot | Yorkshire Dales | Fall | Eric Sugden | [33] [34] |
Dec 1960 | Eastwater Cavern | Mendip | Rock fall | Alan Hartnell | [35] [36] |
Jun 1961 | Coed-y-Mwstwr Woods Cave | South Wales | Rock fall | Tony Lewis | [37] |
Sep 1961 | Ball Eye Mine | Peak District | Fall | George Keeling | [38] [39] |
Jan 1962 | Hell Hole | Yorkshire Dales | Drowned | Eban Beeves | [40] [41] |
Oct 1962 | Alum Pot | Yorkshire Dales | Fall | John Hopley | [42] [43] |
Mar 1963 | Deep Ecton Mine | Peak District | Diving | Garry McElliott | Diving with British Sub-Aqua Club – not a cave diver [44] |
Mar 1963 | Longwood Swallet | Mendip | Hypothermia | Heather Muirhead | [45] [46] |
May 1963 | Mandale Mine | Peak District | Drowned | Roger Low | Drowned after falling down flooded surface shaft [47] [48] |
Nov 1963 | Marble Steps Pot | Yorkshire Dales | Drowned | Mike McShea | [49] |
Mar 1964 | Lancaster Hole | Yorkshire Dales | Diving | Alan Clegg | [50] |
Jun 1966 | Porth yr Ogof | South Wales | Drowned | Richard Speakman | [51] |
Jan 1967 | Alum Pot | Yorkshire Dales | Fall | James Drummond | Schoolboy under supervision [52] [53] |
Feb 1967 | Carlswark Cavern | Peak District | Drowned | Robert MacDonald | 14-year-old schoolboy under supervision [54] [55] |
Mar 1967 | Easter Iron Mine | Forest of Dean | Fall | Rex Keene | Hemp rope broke when abseiling 90 metre shaft [56] [57] |
Jun 1967 | Mossdale Caverns | Yorkshire Dales | Drowned | Dave Adamson Geoffrey Boireau William Frakes John Ogden Michael Ryan Colin Vickers | The bodies were later interred in the far reaches of cave [2] [58] |
Oct 1967 | Sunset Hole | Yorkshire Dales | Fall | Eric Luckhurst | Rescue formed basis of Sid Perou's film Sunday at Sunset Pot [59] |
Aug 1968 | Porth yr Ogof | South Wales | Drowned | Anthony Stannard | [60] |
Mar 1969 | Meregill Hole | Yorkshire Dales | Hypothermia | Christopher Hay | [61] [62] |
Aug 1969 | Ease Gill Caverns | Yorkshire Dales | Rock fall | Duncan Glasfurd | [63] [64] |
Sep 1970 | Pollanaffrin | Northern Ireland | Natural causes | Mick Mulligan | [65] |
Oct 1970 | Keld Head | Yorkshire Dales | Diving | Alan Erith | Remains retrieved 5 years later [66] [52] |
Oct 1970 | Porth yr Ogof | South Wales | Drowned | Stephen Sedgewick | [6] [67] |
Feb 1971 | Porth yr Ogof | South Wales | Drowned | Paul Esser | Remains retrieved in 2010 [68] |
May 1971 | Weathercote Cave | Yorkshire Dales | Rock fall | John Fellows | [69] [70] |
Sep 1971 | Swinsto Cave | Yorkshire Dales | Fall | Michael Midgley | [52] |
Aug 1972 | Firehose Cave | Scotland | Drowned | Peter Clements | [71] |
Mar 1973 | Knotlow Mine | Peak District | Drowned | Alan Evans | [72] |
May 1973 | Wood Mine, Alderley Edge | Peak District | Drowned | Paul Shaw | 14-year-old boy on an outdoor pursuits course [73] |
July 1973 | Porth yr Ogof | South Wales | Drowned | Graham Alston | Trainee soldier on exercise [6] [74] |
Sep 1973 | Eldon Hole | Peak District | Fall | Sulo Sulonen | [75] |
Apr 1974 | Holme Hill Cave | Yorkshire Dales | Fall | Peter Trousdale | [76] |
Jun 1974 | Ogof Agen Allwedd | South Wales | Diving | Roger Solari | Body not recovered [77] [78] |
July 1974 | Merlin's Cave | Peak District | Diving | John Smith | [79] |
Dec 1974 | Gaping Gill | Yorkshire Dales | Fall | David Huxtable | Considered to be the UK's first SRT fatality [80] |
Sep 1975 | Ireby Fell Cavern | Yorkshire Dales | Fall | Stephen Hughes | [81] |
Feb 1976 | Oxlow Cavern | Peak District | Fall | Stephen Nunwick | [82] |
May 1976 | Langstroth Pot | Yorkshire Dales | Drowned | Martin Blackburn Brian Fox Donald Southern | Encountered foul air whilst free-diving [3] |
Aug 1976 | Royal Hopping Mine | Peak District | Rock fall | Leslie Wheeler | [83] |
May 1977 | Blayshaw Gill Pot | Yorkshire Dales | Rock fall | John Rhodes | [84] |
Sep 1977 | Ilam Rising | Peak District | Diving | Mike Nelson | [85] [86] |
April 1978 | Wheal Edward Mine | Cornwall | Fall | Stella Bourke | [87] |
Oct 1979 | Cote Gill Pot | Yorkshire Dales | CO poisoning | Richard Marvel John Staniforth | Result of using high explosives [88] |
Dec 1979 | Ogof Ffynnon Ddu | South Wales | Drowned | J. Fitton D.Gough | Washed away [89] |
Mar 1980 | Bull Pot of the Witches | Yorkshire Dales | Diving | Ian Plant | [90] [91] |
Aug 1980 | GB Cave | Mendip | Natural causes | Ian Roberts-Miller | [92] [93] |
Oct 1980 | Top Sink | Yorkshire Dales | Fall | Tracy Gibson | [94] |
Nov 1980 | Keld Head | Yorkshire Dales | Diving | Mark Woodhouse | [95] [91] |
Feb 1981 | Pollnacrom | Northern Ireland | Diving | David Woods | Body not recovered [96] |
July 1981 | Porth yr Ogof | South Wales | Drowned | Adrian Luck | [97] [98] |
Nov 1981 | Wookey Hole | Mendip | Diving | Keith Potter | [99] [91] |
May 1982 | Gaping Gill | Yorkshire Dales | Fall | Edward Holstead | [100] |
May 1982 | Diccan Pot | Yorkshire Dales | Natural causes | Anthony Mosedale | [100] |
Jun 1982 | Sunset Pot | Yorkshire Dales | Drowned | Neofitos Savva | [100] |
Aug 1982 | Ireby Fell Cavern | Yorkshire Dales | Fall | John Martin | [101] |
Nov 1982 | Gaping Gill | Yorkshire Dales | Fall | Robert Watson | [101] |
Sep 1983 | Smallcleugh Mine | Cumbria | Fall | David Colin Brooks | 17-year-old boy scout fell 18 metres [102] [103] |
Jan 1985 | Hurtle Pot | Yorkshire Dales | Diving | Derek Crossland | [104] [91] |
Feb 1985 | Bagshawe Cavern | Peak District | Drowned | Mark Dowsett | 15-year-old schoolboy on school trip [76] [105] |
Nov 1985 | Lancaster Hole | Yorkshire Dales | Drowned | David James | [106] |
Jan 1986 | Longwood Swallet | Mendip | Rock fall | Atilla Kurucz | [107] [108] |
Mar 1986 | Rowten Pot | Yorkshire Dales | Drowned | David Anderson | Cave Rescue Organisation team member on rescue [109] |
May 1986 | Dale Head Pot | Yorkshire Dales | Drowned | James Taylor | [110] |
July 1986 | Porth yr Ogof | South Wales | Natural causes | Gwynfor Hughes | [6] |
Apr 1988 | unnamed cave | Yorkshire Dales | Diving | Nick Whaite | [111] [91] |
May 1988 | Ease Gill Caverns | Yorkshire Dales | Rock fall | Janet Barnfield Michael Preece David Simpson | [4] |
Aug 1988 | Uamh Claig-ionn | Scotland | Hypothermia | Charles Butterworth | [112] |
Feb 1989 | Jib Tunnel | Yorkshire Dales | Hypothermia | Keith Mann | [113] |
May 1989 | Ivy Green Cave | Peak District | Hypothermia | Michael Boulton | Body found a year later 100 metres (330 ft) in, with no lighting [114] |
Feb 1990 | Kingsdale Master Cave | Yorkshire Dales | Drowned | Phil Tamms | [115] |
Jul 1990 | Glynneath Silica Mine | South Wales | Natural causes | Neville Groom | On management training course [116] |
July 1991 | Jacob's Mine | Peak District | Rock fall | Stephen Goodwin | [117] |
Nov 1991 | Sell Gill Holes | Yorkshire Dales | Natural causes | Francis Hardy | [117] |
Jun 1992 | Porth yr Ogof | South Wales | Drowned | Amanda Stead | [118] |
Jun 1992 | Joint Hole | Yorkshire Dales | Drowned | Martin McMahon | [119] [91] |
Oct 1992 | Porth yr Ogof | South Wales | Drowned | Graham Lipp | Died after rescuing boy [120] [121] |
Jan 1993 | Kingsdale Master Cave | Yorkshire Dales | Drowned | Michael Jones | Washed into Kingsdale Master Cave sump [122] |
Feb 1994 | Lost Johns' Cave | Yorkshire Dales | Rock fall | Paul Lyons | [123] |
July 1994 | Dismal Hill Cave | Yorkshire Dales | Diving | Trevor Kemp | [124] [91] |
Oct 1994 | Old Ing Cave | Yorkshire Dales | Drowned | Peter Ball | [125] |
Nov 1994 | Whittington Stone Mine | Cotswolds | Natural causes | Bob Fairclough | [126] |
Jan 1995 | Marble Arch Caves | Northern Ireland | Drowned | Con Cormican Brian Kennedy Philip Marshall | [5] |
May 1995 | Calf Holes | Yorkshire Dales | Natural causes | Thomas Denny | Management training exercise [127] |
Aug 1996 | Quaking Pot | Yorkshire Dales | Fall | Christine Bleakley | [128] |
May 1997 | Lancaster Hole | Yorkshire Dales | Fall | Michael Jeffries | [129] |
Dec 1998 | Ogof Pont Y Meirw | South Wales | Diving | Peter Fowler | [130] [91] |
Nov 2000 | Lancaster Hole | Yorkshire Dales | Drowned | Howard Rothwell | [131] |
February 2001 | Ireby Fell Cavern | Yorkshire Dales | Drowned | Julian Carrol Ray Lea | [132] |
July 2002 | Porth yr Ogof | South Wales | Drowned | Kevin Sharman | [133] |
Sep 2004 | Notts Pot | Yorkshire Dales | Fall | Paula Szajnowska | [134] |
Mar 2005 | Low Birkwith Cave | Yorkshire Dales | Diving | Colin Pryer | [135] [91] |
Nov 2005 | Manchester Hole | Yorkshire Dales | Hypothermia | Joseph Lister | Schoolboy under supervision [136] |
Mar 2006 | Upper Flood Swallet | Mendip | Natural causes | Malcolm Cotter | [137] |
Mar 2006 | Astonhill Swallet | Peak District | Rock fall | David Briggs | [137] [138] |
Aug 2006 | Meregill Skit | Yorkshire Dales | Natural causes | Mike Wooding | Died of natural causes whilst diving [139] |
Dec 2007 | Giant's Hole | Peak District | Hypothermia | Paul Fowkes | [140] [141] |
Dec 2007 | Lower Long Churn | Yorkshire Dales | Drowned | Caroline Fletcher Stuart Goodwill | [142] [143] |
July 2008 | Coal mine at Craigmillar | Scotland | Asphyxia | Peter Ireson | Abseiled into foul air in disused coal mine [144] [145] |
Apr 2011 | Pwll-y-Cym | South Wales | Diving | Bonnie Cotier | [146] [147] |
Aug 2014 | Aber Las Mine | North Wales | Asphyxia | Will Smith | Overcome by foul air in disused slate mine [148] [149] [150] |
Feb 2015 | Bull Pot, Kingsdale | Yorkshire Dales | Rock fall | Gordon Aitken | [151] [152] |
Aug 2017 | Ewes Top Moss Pot, Scales Moor | Yorkshire Dales | Natural causes | Michael Wood | Date uncertain - body not found for several weeks [153] [154] |
Jun 2019 | Curtain Pot, Fountains Fell | Yorkshire Dales | Fall | Harry Hesketh | [155] [156] |
Jan 2020 | Lancaster Hole | Yorkshire Dales | Diving | Simon Halliday | [157] [158] |
Mar 2023 | Ayton Monument Mine, Great Ayton | Other | Asphyxia | Adam Perkins | [159] [160] |
Jan 2025 | Diccan Pot | Yorkshire Dales | Fall | Not yet publicly confirmed | [161] |
The following table summarises the major causes of fatality in UK caving by cause and by area. The commonest cause of fatality in the UK is drowning - accounting for almost half the deaths when cave diving is included, and 40% when diving is excluded. The second major cause of fatality, when cave diving is excluded, is falling from height which accounts for 23% of fatalities, followed by rock fall which accounts for 13% of fatalities. The 'Other' category includes gas poisoning and asphyxiation.
Area | Diving | Drowned | Fall | Rock fall | Hypothermia | Natural causes | Other | Total |
---|---|---|---|---|---|---|---|---|
Mendip | 2 | 0 | 0 | 2 | 2 | 2 | 0 | 8 |
Northern Ireland | 1 | 3 | 0 | 0 | 0 | 1 | 0 | 5 |
Peak District | 3 | 5 | 7 | 3 | 4 | 0 | 1 | 23 |
South Wales | 3 | 12 | 0 | 1 | 0 | 2 | 0 | 18 |
Yorkshire Dales | 9 | 26 | 18 | 10 | 5 | 5 | 2 | 75 |
Other | 0 | 1 | 3 | 0 | 1 | 1 | 3 | 9 |
Total | 18 | 47 | 28 | 16 | 12 | 11 | 6 | 138 |
The following table summarises the major causes of fatality in UK caving by decade. The changes from decade to decade partly reflect the different numbers of active cavers, partly changing techniques, and partly improved equipment. [162]
Decade | Diving | Drowned | Fall | Rock fall | Hypothermia | Natural causes | Other | Total |
---|---|---|---|---|---|---|---|---|
1900s | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
1910s | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
1920s | 0 | 0 | 0 | 0 | 2 | 0 | 0 | 2 |
1930s | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 2 |
1940s | 1 | 0 | 2 | 0 | 1 | 0 | 0 | 4 |
1950s | 0 | 2 | 3 | 1 | 2 | 0 | 1 | 9 |
1960s | 2 | 12 | 5 | 3 | 2 | 0 | 0 | 24 |
1970s | 4 | 11 | 7 | 3 | 0 | 1 | 2 | 28 |
1980s | 6 | 6 | 5 | 4 | 3 | 3 | 0 | 27 |
1990s | 2 | 9 | 2 | 2 | 0 | 4 | 0 | 19 |
2000s | 1 | 6 | 1 | 1 | 2 | 2 | 1 | 14 |
2010s | 1 | 0 | 1 | 1 | 0 | 1 | 1 | 5 |
2020s | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 3 |
Total | 18 | 47 | 28 | 16 | 12 | 11 | 6 | 138 |
The following bar chart shows the number of fatalities in each decade:
Caving, also known as spelunking and potholing, is the recreational pastime of exploring wild cave systems. In contrast, speleology is the scientific study of caves and the cave environment.
Cave rescue is a highly specialized field of wilderness rescue in which injured, trapped or lost cave explorers are medically treated and extracted from various cave environments.
Gaping Gill is a natural cave in North Yorkshire, England. It is one of the unmistakable landmarks on the southern slopes of Ingleborough – a 98-metre (322 ft) deep pothole with the stream Fell Beck flowing into it. After falling through one of the largest known underground chambers in Britain, the water disappears into the bouldery floor and eventually resurges adjacent to Ingleborough Cave.
The Cave Diving Group (CDG) is a United Kingdom-based diver training organisation specialising in cave diving.
Rowten Pot is one of several entrances into the 27-kilometre (17 mi) long cave system that drains Kingsdale in North Yorkshire, England. Its entrance is a shaft some 27 metres (89 ft) long, 10 metres (33 ft) wide, and at the southern end 72 metres (236 ft) deep.
The Marble Arch Caves are a series of natural limestone caves located near the village of Florencecourt in County Fermanagh, Northern Ireland. The caves are named after the nearby Marble Arch, a natural limestone arch at the upstream end of Cladagh Glen under which the Cladagh River flows. The caves are formed from three rivers draining off the northern slopes of Cuilcagh mountain, which combine underground to form the Cladagh. On the surface, the river emerges from the largest karst resurgence in Ireland, and one of the largest in the United Kingdom. At 11.5 kilometres (7.1 mi) the Marble Arch Caves form the longest known cave system in Northern Ireland, and the karst is considered to be among the finest in the British Isles.
Mossdale Caverns is a cave system in the Yorkshire Dales, England. It is about 5 kilometres (3.1 mi) north of Grassington, and east of Conistone, where Mossdale Beck sinks at the base of Mossdale Scar. It lies at an altitude of 425 metres (1,394 ft) on the eastern flank of Wharfedale, and extends south-east beneath Grassington Moor.
The Cave Rescue Organisation (CRO) is a voluntary body based in the caving area of the Yorkshire Dales in northern England. Founded in 1935, it is the first cave rescue agency in the world.
Recreational caving in the United Kingdom dates back to the mid-19th century. The four major caving areas of the United Kingdom are North Yorkshire, South Wales, Derbyshire, and the Mendips. Minor areas include Devon, North Wales, and the Scottish Highlands.
Langcliffe Pot is a cave system on the slopes of Great Whernside in Upper Wharfedale, about 3 kilometres (1.9 mi) SSE of Kettlewell in North Yorkshire. It is part of the Black Keld Site of Special Scientific Interest where the "underground drainage system which feeds the stream resurgence at Black Keld is one of the largest and deepest in Britain, although only a small proportion of its cave passages are accessible at present." Mossdale Caverns is also part of the Black Keld SSSI. Although a considerable length of passage has been explored in Langcliffe Pot, the current end is over 170 metres (560 ft) above the resurgence, and over 4 kilometres (2.5 mi) in distance. A trip to the far end has been described as "one of the most serious undertakings in British caving".
Alum Pot is a pothole with a large open shaft at a surface elevation of 343 metres (1,125 ft) on the eastern flanks of Simon Fell, North Yorkshire, England. It connects with nearby Long Churn Cave and Diccan Pot. The pot is accessed via a 1-km private track on payment of a small fee from Selside Farm in the hamlet of Selside in Ribblesdale. Alum Pot has variously been known as Allan, Alan, Allen, Hellen and Hell'n.
The Upper Wharfedale Fell Rescue Association is based in Grassington in the Yorkshire Dales of northern England, and provides help to people and animals in difficulty in the caves and on the fells around Wharfedale, Nidderdale, Littondale and Mid-Airedale. Although it is staffed by approximately 80 volunteers and funded by donations, it is integrated into the emergency services and is called out by the police when there is an appropriate incident. The Upper Wharfedale Fell Rescue Association was founded in 1948, and is the third oldest such team in the UK.
Long Churn Cave is a cave in the Ingleborough area of the Yorkshire Dales. First explored before 1779, it has become a popular location for beginner cavers and it contains the most famous squeeze in the Dales, the "Cheesepress". It is near Selside, about 9 miles (14 km) north of Ingleton, North Yorkshire. Access is by permission from the landowner at Selside Farm after payment of a nominal fee.
A boulder choke is a collection of large rocks or rubble that obstructs a shaft or passage in a cave or mine. In order to progress through passages cavers often need to negotiate or clear boulder chokes.
Robert Dove Leakey was a British inventor, potholer and cave diver. He has been described as the "Edmund Hillary of potholing". He stood for Parliament in 2005 and 2010; he is thought to be the oldest candidate ever in a UK general election, shortly before his 96th birthday in May 2010.
Jim Eyre (1925–2008) was a British caver, known for being one of the first European cavers to explore the caves of Asia. In 1946 in Lancaster, Eyre helped to found the Red Rose Cave and Pot Hole Club, where he was prominent in the earliest exploration of the Ease Gill Caverns.
The Three Counties System is a set of inter-connected limestone solutional cave systems spanning the borders of Cumbria, Lancashire and North Yorkshire in the north of England. The possibility of connecting a number of discrete cave systems in the area to create a single super-system that spans the county borders was first proposed by Dave Brook in 1968, and it was achieved in 2011. The system is currently about 90 kilometres (56 mi) long, making it the longest in the UK and the thirty-fourth longest in the world, and there continues to be scope for considerably extending the system.
The 1973 Mount Gambier cave diving accident was a scuba diving incident on 28 May 1973 at a flooded sinkhole known as "The Shaft" near Mount Gambier in South Australia. The incident claimed the lives of four recreational scuba divers: siblings Stephen and Christine M. Millott, Gordon G. Roberts, and John H. Bockerman. The four divers explored beyond their own planned limits, without the use of a guideline, and subsequently became lost, eventually exhausting their breathing air and drowning, with their bodies all recovered over the next year. To date, they are the only known fatalities at the site. Four other divers from the same group survived.
David (Dave) Heap was largely responsible for the opening up and development of caving and potholing in Northern Norway in the 1960s and 1970s. He led a number of speleological expeditions not only to Norway but the French Pyrenees and to Greece. He was the author of the now classic caving book Potholing Beneath the Northern Pennines.