Highways England is now responsible for the vast majority of the historic railways estate. This includes legacy bridges, abutments, tunnels, cuttings, viaducts and similar properties associated with closed railway lines, and sales. Network Rail is still responsible for a small proportion of disused railway lines which have been retained due to their close proximity or connection to currently operational railway lines. Network Rail’s records however do not distinguish between disused and operational railway lines, and therefore it is not possible to precisely indicate how much disused network they own.