Hertfordshire is a ceremonial county in the East of England and one of the home counties. It borders Bedfordshire to the north-west, Cambridgeshire to the north-east, Essex to the east, Greater London to the south, and Buckinghamshire to the west. The largest settlement is Watford, and the county town is Hertford.
The M25 or London Orbital Motorway is a major road encircling most of Greater London. The 117-mile (188-kilometre) motorway is one of the most important roads in the UK and one of the busiest. Margaret Thatcher opened the final section in 1986, making the M25 the longest ring road in Europe upon opening. The Dartford Crossing completes the orbital route but is not classed as motorway; it is classed as a trunk road and designated as the A282. In some cases, including notable legal contexts such as the Communications Act 2003, the M25 is used as a de facto alternative boundary for Greater London.
The Taunton Stop Line was a World War II defensive line in southwest England. It was designed "to stop an enemy's advance from the west and in particular a rapid advance supported by armoured fighting vehicles which may have broken through the forward defences."
The GHQ Line was a defence line built in the United Kingdom during World War II to contain an expected German invasion.
Watford is a town and borough in Hertfordshire, England, 15 mi (24 km) north-west of Central London, on the banks of the River Colne.
Epping Forest District is a local government district in Essex, England. It is named after the ancient woodland of Epping Forest, a large part of which lies within the district. The council is based in the town of Epping. The district also includes the towns of Loughton, Waltham Abbey, Chigwell, Buckhurst Hill, as well as rural areas. The district is situated in the west of the county, bordering north-eastern Greater London.
Ambresbury Banks is the name given to the remains of an Iron Age hill fort in Epping Forest, Essex, England.
The Colne is a river and a tributary of the River Thames in England. Just over half its course is in south Hertfordshire. Downstream, it forms the boundary between Buckinghamshire and the London Borough of Hillingdon. The confluence with the River Thames is on the Staines reach at Staines-upon-Thames.
British anti-invasion preparations of the Second World War entailed a large-scale division of military and civilian mobilisation in response to the threat of invasion by German armed forces in 1940 and 1941. The British Army needed to recover from the defeat of the British Expeditionary Force in France, and 1.5 million men were enrolled as part-time soldiers in the Home Guard. The rapid construction of field fortifications transformed much of the United Kingdom, especially southern England, into a prepared battlefield. Sea Lion was never taken beyond the preliminary assembly of forces. Today, little remains of Britain's anti-invasion preparations, although reinforced concrete structures such as pillboxes and anti-tank cubes can still be commonly found, particularly in the coastal counties.
British hardened field defences of World War II were small fortified structures constructed as a part of British anti-invasion preparations. They were popularly known as pillboxes, a reference to their shape.
The Coquet Stop Line, which ran from Amble in Northumberland up the valley of the River Coquet, formed part of the defences constructed to meet the threat of a Nazi invasion during the Second World War. It was intended to slow the advance of the German army from the north to give time for a field army to assemble on the Tyne Stop Line around 30 miles to the south.
Maple Cross is a village in Hertfordshire, England, which up until the Second World War consisted of an inn, a blacksmith's shop and a few cottages. Today there are around 800 postwar council houses. Some of these have been sold into private ownership. The area is close by junction 17 of the M25 motorway, which makes up the western boundary of the village. It lies on the western fringe of Rickmansworth, about 5 miles (8.0 km) west of Watford and 6 miles north of Uxbridge.
The fortifications of London are extensive and mostly well maintained, though many of the City of London's fortifications and defences were dismantled in the 17th and 18th century. Many of those that remain are tourist attractions, most notably the Tower of London.
The Ringwood West Line was a World War II defensive line in England, running south from the GHQ Line near Frome to the coast.
Nazeing is a village and parish in Essex, England. Within the parish are the separate settlements of Upper Nazeing, Middle Nazeing, and Lower Nazeing. The Prime Meridian passes to the west of Lower Nazeing.
The Lee Flood Relief Channel (FRC) is located in the Lea Valley and flows between Ware, Hertfordshire, and Stratford, east London. Work started on the channel in 1947 following major flooding and it was fully operational by 1976. The channel incorporates existing watercourses, lakes, and new channels. Water from the channel feeds the Lee Valley Reservoir Chain.
Loughton Camp is an Iron Age Hill fort in Epping Forest, one mile (1.6 km) northwest of the town of Loughton.
The Tett turret is a type of hardened field fortification built in Britain during the invasion crisis of 1940–1941. It was a small circular pillbox named after its inventor H.L. Tett and manufactured as a private commercial venture by Burbridge Builders Ltd of Surrey. It comprised a revolving concrete turret mounted on a ball race that allowed it to be turned easily. The turret was set above a pit; in early designs, the pit was formed by a standard section of concrete pipe 4 feet (1.2 m) in diameter.
Colliers Hatch, is a hamlet in the civil parish of Stapleford Tawney in the Epping Forest district of the county of Essex, England. It is approximately 2 miles (3 km) east of Epping, 3.5 miles (6 km) west of Chipping Ongar and 7 miles (11 km) north of Romford. Colliers Hatch is 0.5 miles (0.8 km) north of the hamlet of Tawney Common, also in the Stapleford Tawney parish.
Bushey Arches Viaduct is a railway bridge on the West Coast Main Line immediately north of Bushey railway station, between Bushey and Watford, in Hertfordshire, Eastern England, just north-west of London.
