On 30 June 1841 the Great Western Railway company opened its first main line between London and Bristol. By this means the capital and one of the most important seaports were connected by a trunk railway line. The line was well laid out, passing through
Reading and Bath. Its engineer was
Isambard Kingdom Brunel. At the early date when the design of the line was being finalised, Brunel was not confident of the ability of the steam engines of the day to ascend significant gradients pulling a load, and the solution appeared to be to concentrate the stiffest climb in a limited distance, and to make the remainder of the route as near to constantly level as possible. The short, steep sections could, he believed, be worked with stationary steam engines hauling the trains up by rope. Accordingly, Brunel designed the main line with two such inclines, in
Box Tunnel and at Wootton Bassett. In fact by the time the railway was being built, the capacity and reliability of steam engines had advanced considerably, and the stationary steam engines were never installed, but the legacy of the two steep inclines remained. and the
South Wales Railway was formed to build on from near Gloucester to
Milford Haven. This was with a view to capturing the transatlantic maritime trade as well as communication with Ireland. The Cheltenham and Great Western Union Railway was absorbed by the Great Western Railway before the line was opened, and the South Wales Railway amalgamated with the GWR in 1863. The network was built on the broad gauge, and this led to difficulty in competing for coal traffic from South Wales to London and the South Coast of England, as most of the coal was extracted in the South Wales Valleys, which were generally connected by narrow (standard) gauge railways. The physical transshipment of the mineral was laborious and expensive, and many producers preferred to use coastal shipping instead. As the South Wales coal business increased exponentially, there was thus a residual hostility to the Great Western Railway, and this continued after conversion of the track gauge in 1873, when at last the GWR could freely convey coal on the most direct routes available. ==The Severn Tunnel==