Flash, it is one of the many General Motors diesel locomotives which dominate our rails these days. They are a sort of SD70, I think. Most of our trains have one locomotive, unless they are older units of lower horsepower, when two can be used.
The charter was 1Z61 form Layton to London King's Cross. Last coach in the train was in blue Pullman livery.
I then travelled to Wakefield on a GNER train and visited the model railway exhibition. On returning to Wakefield Westgate station, I had time to photograph a train or two. Here is "Pacer" 144 007 arriving
Immediately I arrived back at Doncaster, a convoy of locomotives arrived, headed by 60 065. This was train 6D01 Thornaby-Doncaster. The other locomotives were 60009, 66001, 66012 and 66070. These locomotives were being readied for week-end engineer's trains.