Jonathan Fox is Director of London Rail which manages TfL's non-London Underground train services.
He previously worked for British Rail, EWS Railways, Docklands Light Railway and was a founder member of Ultravox before going solo, reaching no.31 in the charts with "Underpass" in 1980
I know Jon Fox, used to play cricket with him many years ago. Anyway I can imagine that a solitary class 315 would not be ideal regarding spares and replacements. I wonder if an additional 710 will be provided for the Up-Rom shuttle.
Anyway, shame to hear the 710 failed today but I guess that is also part and parcel of new stock introductions.
Both RTT and NR are showing a full 15-minute interval service from Saturday 8th June. Albeit the NR site still has warnings that a reduced service is in operation!
And NR is showing 4 trains an hour on the Euston - Watford local from 22nd June (currently 3 trains an hour with a half hour gap). Presumably using either new 710(s) or getting a 378 back from the Goblin.