(26 Apr 2014, 9:28 pm)Marcus wrote I suppose the 34 part was taken from the 734. I recall a lot of Chester's services (some of the other depot's seem to be quite strange) were direct decendants with a removed, like the 778 is now the 78, and if I recall the 740 which seemed to get a lot of Deltas (once again, I was quite young), I think became the foundations for the 28. I reckon all north east enthusiasts know the 21 was originally the 724 (the NNRG are doing a rerun of it with their 4710 on August 31 I believe), and also the 723 was the X21?
The 723 was replaced by the 7 between Durham and Darlington while the Durham to Newcastle section was assimilated into the frequency of the 21 as were the 722 and 724. The X21 started a little later on.