The District Railway electric service extended eastward as far as Barking in 1908. Delayed by World War I, an additional pair of electrified tracks were extended by the LMSR and services of the District continued to Upminster in 1932. The District Railway was incorporated into London Transport in 1933, and became known as the District line. A new station at Upminster Bridge on the District line became the next station to the west in 1934. After nationalisation of the railways in 1948, management of Upminster station passed to British Railways.