Okay, so a pair of OSRAM NIGHT BREAKER LASER H7, sorted this light issue right out. Total cost = £12.46. I'm Scottish....
Why does the message on the dash not just say, cornering bulb out, check/replace rather than the cryptic message, AFS fault?
The local VW dealer I spoke to charge a diagnosis fee of £60+VAT = £75.00 And in this case they'd have then replaced the bulb(s), so this simple bulb issue could well have cost me £100.00 if not more, including the diag fee and bulb(s). Had it not been for the good people of GolfGTI Forum that is.
Thanks again, folks.