 In the 1970s the site was extensively rebuilt; part of the Ferme Park sidings south of the shed were cleared, and a new Electric multiple unit depot constructed; the work was done as part of the Great Northern electrification; a new maintenance shed was constructed with six roads, each capable of holding an eight car train.At the same time the old loco shed was converted to use as an Overhead Line (OHL) maintenance depot, stabling an OHL repair train.After 1973 the depot code became HE.