Part 3 - Fixed
So the problem go worse to the point the car was stopping while driving. roughly 30 seconds from starting and moving away to then flash warnings and refuse to start. I limped home after 10 minutes of trying to start.
Relays 614 and 395 are apparently know issues and I bought 2 new relays from a VW garage. Cost circa £20 each. They didn't seem damaged or broken but replacing them has worked well.
Getting to the ECU box on the right hand side required removing the windscreen wipers and black plastic under the window but was otherwise okay.
Since being replaced I've had 24hrs of okay starting and driving. if anything fails I will update here
Ben