Spanning the two-mile distance between Hillingdon and the M25 on the outskirts of London, the Colne Valley viaduct is the longest railway bridge in the UK, replacing the Forth Bridge in Scotland.

Built between 1975 and 1982, the locomotives have been purchased by 125 Heritage and will be homed at Colne Valley Railway in Colchester, Essex. The trains slashed journey times and helped improve ...