So pleased, while in London, I got to travel on a Class 710 for the very first time and yes they do look similar to the Class 345s, that will be used on the Elizabeth line.
More photos from this set can be found at www.gordon-valentine.com/zenphoto/railway-stations/gospel-oak/
Although I live near Wanstead Park station on the Barking Gospel Oak Line, have only had one of the new trains once. The seating seemed almost identical to the 378, but i found the ride a bit bumpy in places
Sweet!