A couple of photos of the first day of 710s on the GOBLIN, 23 May:
710261 at Upper Holloway:
710269 at Harringay Green Lanes:
The 378s will continue for a while: here's one at South Tottenham:
I think the new trains look much smarter, but it's a pity that the seats
haven't been improved to, say, even S stock standards, let alone the much
higher standards that prevailed in the 1970s.
I'm curious why only two 710s were introduced yesterday. There are several
more sitting in Willesden, and there's been ample time to update their
software. Could it be that not enough drivers have qualified on them yet?