(09 Nov 2015, 5:13 pm)Jimmi wrote Can't of been 4001, as Tommy's photo was taken in June 2014 whereas 4001 will still in service at Darlington depot in November 2014: https://flic.kr/p/oZCe6y
Also 4001 had the registration S868 ONL, S891 ONL was 4005.
sorry 4005 i think S891 ONL was