My R is staying at Pulman Sunderland overnight. I was there about 2 hours in case they were going to scan and perform some quick fix. When it was clear they'd be working on it most of the day, I got a lift to the Shields ferry in their GTD Estate.
Their master tech seems more willing to fix than anyone at the Durham branch, and got stuck into mine as soon as it arrived - he apparently came 4th in the country in some assessment of master techs. Early indications are that their the EMU is buggered or there are some serious wiring issues - it will be connected to Das Vaterland for remote deep analysis in Germany tomorrow. I think they found more wrong than the lights on the dash have indicated to me. My stop-start was not working on the way there today, but I didn't get any MFD indication that it wasn't being allowed to work (the "A" with a slash through it was not showing).