British Railways announced a complete rebuild of Euston that could accommodate a fully electrified West Coast Main Line in 1959. Because of the restricted layout of track and tunnels at the northern end, enlargement could be accomplished only by expanding southwards over the area occupied by the Great Hall and the Arch. Consequently, the London County Council were given notice that the Arch and the Great Hall would be demolished, which was granted on the proviso that the Arch would be restored and re-sited. This was financially unviable as BR estimated it would cost at least £190,000 (now £).