The Llanelly and Mynydd Mawr Railway (LMMR), earlier known as the Carmarthenshire Tramroad, was established in 1802 in Wales by an Act of Parliament. It began running trains in 1803, with the initial line being a plateway with motive power provided by a pair of horses. The LMMR is claimed to be the oldest public railway in Great Britain. Although the Surrey Iron Railway was the first to be incorporated, it is believed that the LMMR was the first to open to traffic.
The Carmarthenshire Tramroad closed in 1844 but the railway reopened in 1883, operated by the newly formed Llanelly and Mynydd Mawr Railway Co. That company disappeared in 1922 on being absorbed into the Great Western Railway, which was itself absorbed into British Railways in 1947. Throughout the twentieth century, the line continued as a main artery for coal distribution from the Gwendraeth valley, until the closure of Cynheidre Colliery in 1989.
Llanelli and District Railway Society
Early days of the L&MMR, with development of the locomotive shed, 2008
The Llanelli and District Railway Society (L&DRS) ran an unsuccessful campaign lasting almost ten years to save the intact but derelict line. The railway was sold in the mid 1990s by the British Rail property board to the local authorities as part of a scheme to transform the track bed into a cycle way. This path is now labelled as the Swiss Valley Cycle Route, part of National Cycle Route 47, itself a part of the Celtic Trail.
Whilst the L&DRS's efforts were thwarted, a new charitable company (Registered Charity No. 1087985) was incorporated on 13 August 2001.[1] It is a non-profit making company, limited by guarantee.
The company is named The Llanelli and Mynydd Mawr Railway Company Ltd, therefore reviving the name of the former operator albeit with the later Llanelli spelling. The primary stated objective of the charity is to reinstate a railway along the historic line. A heritage centre also interprets the history of coal mining in the area, even in particular the industry which the railway itelf once served.
The charity's scheme will utilise derelict land on the site of the former colliery, which is now owned by the LMMR outright as of 2025. In the long-term, the railway, which closed to rail traffic in 1989, aims to be reinstated where possible. Work at the site at Cynheidre, near Llanelli, is currently progressing. The first phase will include the placing of a locomotive shed on site, as well as making the site available to the public. The primary objective is to achieve a running line of one mile (1.6km) consisting of a platform, locomotive shed, heritage centre, gift shop and café. As of February 2025, the locomotive shed had been fully constructed and this allowed for the rolling stock to be transported to the site on 19–22 November 2007.
The railway held its first public open day on Sunday 3 September 2017, which saw the railway operate brake van rides using Sentinel 0-4-0DH shunter no. 10222 and BR Brakevan no. 981287.
Rolling stock
The LMMR operates and, in some cases, owns the following rolling stock:
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