the depot and through the new station before entering the new section of tunnel and returning to Shepherd's Bush. Changes were also made to the depot layout to accommodate the new station and the new looped operations. Construction work on the exhibition site had started in January 1907, and the exhibition and new station opened on 1908. The station was on the surface between the two tunnel openings and was a basic design by Harry Bell Measures. It had platforms both sides of the curving track – passengers alighted on to one and boarded from the other (an arrangement now known as the Spanish solution). Liverpool Street, 1908–1912 With the extension to Wood Lane operational, the CLR revisited its earlier plan for an eastward extension from Bank to Liverpool Street station. This time, the Great Eastern Railway (GER) agreed to allow the CLR to build a station under its own main line terminus, provided that no further extension would be made north or north-east from there – territory served by the GER's routes from Liverpool Street. A bill was announced in November 1908, for the 1909 parliamentary session and received Royal Assent as the Central London Railway Act, 1909 on 1909. Construction started in July 1910 and the new Liverpool Street station was opened on 1912. Following their successful introduction at the DR's Earl's Court station in 1911, the station was the first underground station in London to be built with escalators. Four were provided, two to Liverpool Street station and two to the North London Railway's adjacent Broad Street station. Ealing Broadway, 1911–1920 The CLR's next planned extension was westward to Ealing. In 1905, the Great Western Railway (GWR) had obtained parliamentary approval to construct the Ealing and Shepherd's Bush Railway (E&SBR), connecting its main line route at Ealing Broadway to the West London Railway (WLR) north of Shepherd's Bush. From Ealing, the new line was to curve north-east through still mostly rural North Acton, then run east for a short distance parallel with the GWR's High Wycombe line, before curving south-east. The line was then to run on an embankment south of Old Oak Common and Wormwood Scrubs before connecting to the WLR a short distance to the north of the CLR's depot. Construction work did not begin immediately, and, in 1911, the CLR and GWR agreed running powers for CLR services over the line to Ealing Broadway.