Managed to get hold of my order number from dealers today, rang audi customer services and was told they have and unconfirmed build week of week 21 which is 24th may but this might change and to ring back in a month for an update.
Excellent news Fadge. Always reassuring to have a build date, even though they are always provisional until a week or so before build. At least you now know for sure that you are in the queue.