(27 Mar 2023, 6:02 am)mb134 wrote This 'new' 7513 is indeed a replacement for 7508 after it was written off after hitting a low bridge. Believe it's currently being converted to single door. The new 7510 was of course the replacement for the initial 7513.

Right. I had always assumed that the new 7510 was a replacement for the original 7510 which went up in a sheet somewhere in Northumberland years ago. An easy mistake to make !