73131 slowly and carefully descends the 1 in 30 gradient on the Folkestone Harbour branch, as it works the Pathfinder Tours 1Z85 05:48 Crewe to Folkestone Harbour 'Hop'n'Stop' railtour on 11 May 2002. As the 73 only worked the short trip from Folkestone to the harbour, and 66539 did the hard work climbing back up the gradient, its main contribution was braking the heavy train!