Thanks for replies . Maybe the A9 causing the fault tourershine !! Vw sent an AA tech who met me outside lookers Carlisle , he told me before meeting that he wouldn't be able to sort it and would need vw tech - lookers "no tech here " wouldn't / couldn't look at it.
So , I've made it to harwich , now 90 miles till no start so I'm gonna get on the boat in the morning, try n make it to first campsite n call vw assist in Netherlands .
AA tech reckoned it needed 10 litres at least of Adblue, so kept pouring it in till overflowing, so that's another problem too now!