London is the starting point for a number of motorway routes. The M25 is an orbital motorway which enables vehicles to avoid travelling through central London and is one of the busiest motorways in Europe.
The Central London Railway (CLR), also known as the Twopenny Tube, was a deep-level, underground "tube" railway that opened in London in 1900. Today, the CLR's tunnels and stations form the central section of the London Underground's Central line.
The railway company was established in 1889, funding for construction was obtained in 1895 through a syndicate of financiers and work took place from 1896 to 1900. When opened, the CLR served 13 stations and ran completely underground in a pair of tunnels for 9.14 kilometres (5.68 mi) between its western terminus at Shepherd's Bush and its eastern terminus at the Bank of England, with a depot and power station to the north of the western terminus. After a rejected proposal to turn the line into a loop, it was extended at the western end to Wood Lane in 1908 and at the eastern end to Liverpool Street station in 1912. In 1920, it was extended along a Great Western Railway line to Ealing to serve a total distance of 17.57 kilometres (10.92 mi).
After initially making good returns for investors, the CLR suffered a decline in passenger numbers due to increased competition from other underground railway lines and new motorised buses. In 1913, it was taken over by the Underground Electric Railways Company of London (UERL), operator of the majority of London's underground railways. In 1933 the CLR was taken into public ownership along with the UERL.
Through his leadership of the MR, SER and MS&LR, Watkin had the amibtion to construct a new mainline railway connecting the north of England, via London and Kent to the continent. Although his plans for a channel tunnel to be constructed by his Anglo-French Submarine Railway were never realised, the MS&LR constructed its London extension in the 1890s from Annesley, Nottinghamshire to the MR's station at Quainton Road in Buckinghamshire to a continental loading gauge. Reflecting its enhanced connections the MS&LR changed its name to the Great Central Railway in 1987.
To encourage tourist day-trips on the MR, Watkin planned a pleasure grounds at Wembley Park, with a large tower, "Watkin's Tower", intended to be larger than the Eiffel Tower. The park opened in 1896, but because of cost and structural problems, the tower was never completed and was demolished after Watkin's death. The site was subsequently used for Wembley Stadium.