Just returned from VW with new MIB fitted quick test on the way home found it to be spot on

Real test will be tomorrow from cold so to speak

Anyways unit is running later hardware and firmware than the removed unit but is has 2014/2015 maps installed where as I think I upgraded to 2015/2016? Won't be doing this upgrade again in case the upgrade caused the issue (not certain but once done cannot be reversed so not risking it

)
New Hardware is H44 & New Firmware is 0376
My old unit was running H43 & 0362
The service from local dealer has been excellent and being able to email the master tech direct made life a lot easier especially when sending over pics of the issue.
Will update after cold start test......wish me luck