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. To make a connection to the E&SBR, the CLR obtained parliamentary permission for a short extension northward from Wood Lane station on 1911 in the "Central London Railway Act, 1911". The new E&SBR line was constructed by the GWR and opened as a steam-hauled freight only line on 1917. Electrification of the track and the start of CLR services were postponed until after the end of World War I, not starting until 1920 when a single intermediate station at East Acton was also opened.