 Most of the route transferred to the Central line of the London Transport Executive (LTE) during 1947 and 1948 as part of the war-delayed New Works Programme.The transfer brought fourth-rail electrification to replace steam and construction of a deep-level line connecting Leytonstone on the Ongar branch with Newbury Park on the loop, together with severing connections between Newbury Park and Ilford and Seven Kings.First to go was the westward curve between Newbury Park Junction and Ilford Carriage Sidings Junction, on 30 November 1947.