@Asker - thanks for the words and yes, was exactly one of my questions to Craig re remapping.
@Neil - thanks. Will be in touch re wheels over the next day or so. Would like to collect before the weekends out of you're around.
Update - RAC gut came out as no dedicated VW Assistance immediately available. No faults showing on his laptop/general OBCD software so sent us on our way, following for a couple of junctions with a VW home visit booked for 8am.
All OK so he left us then, yes you guessed, broken down on hard shoulder. Currently stood on other side of Armco waiting for a recovery agents vehicle.
They rang and quoted up to 3 hours to get us recovered "due to Taco(graph not Mexican) laws and not having enough time to get us 70 miles home.
Needless to say I've been back on the phone to RAC. Waiting for them to call me with a solution but man now on his way to get us safely off the hard shoulder.