Many thanks for the advice.
A bit of an update:-
Had the ‘offender’ diagnosed as the centre left sensor, so now have a replacement on order, so fingers crossed.
Diagnostics was done by an independent, when travelling to W.Wales. Incase it helps someone at some time, they are P.W. Motorsports at a village called Clunderwen, just off the St. Clears to Haverfordwest main road.
I must say, I found them efficient and most helpful, and to me - the icing on the cake is that you can talk with them, rather than a service receptionist. Karol Gos runs the place, and he quickly gave me the Audi part number and advised not to pay Audi’s £160! but to buy an aftermarket one. All in all, a superb service in my book. I can’t vouch for their service work, but I was certainly impressed with the assistance I had.
Well done Karol, and thank you for your help.
So it will be bumper off to get at this one, and I hope for good luck.
Many thanks again.
Kind regards,
Gareth.