Carwow are saying 18 to 23 weeks for the Q2, choosing the Q2 as it’s the only one on Motability now but some other models are longer.
I order a VW Tiguan from the VAG in October and was told April / May but expecting in June / July if I’m lucky but I think your dealer was being a bit optimistic about February and if it was that date the dealer should have a definite build date for the car now.
What I’m doing to get a rough ideal, and its only a rough ideal, is to find a UK based user forum for Audi owners and like the Tiguan forum I use they might have a thread going on delivery times for your chosen model. It’s from the Tiguan users forum I use that I know my car is going to be July not April but like I said, its still not for sure.