The two mile long line opened in 1902 and linked the Metropolitan District Railway at Whitechapel (St Mary's) with the London, Tilbury and Southend Railway at the above-ground Campbell Road Junction at Bow, to the west of Bromley station. The line from Whitechapel to Bow, and on to East Ham, was electrified in 1905.[3] Regular services were provided by the District Railway with joint stock. A through Ealing Broadway to Southend service was also provided from 1910 to 1939, traction west of Barking being provided by District Railway's electric locomotives. The LMS extended electrified track east from Barking and electric District Railway trains reached Upminster in 1932.[3]