50008 Thunderer & 50015 Valiant pass Castor on 11 April 2015 with the 1M48 12:50 Peterborough to Wansford service, during the Nene Valley Railway's Diesel Gala. This pair were virtually inseparable during 1991, when despite being officially DCWA engineer's locos, they worked several railtours, with 50008 in the livery we see here, and 50015 in 'Dutch' engineer's livery.