Well done Carl. Sounds like you re making good progress already. I strongly suspect that if you hold your ground and ask to speak to the Dealer Principal and, if necessary, threaten to escalate a complaint to BMW UK (even though you won’t need to), they will honour the original AP. It’s worth mentioning (as you say) that £500 off the AP is a pretty standard thing and that you want them to honour the AP as it was when you placed the order. I strongly suggest that you don’t heed the advice of others to walk away. The only person who loses in that situation would be you. You will end up waiting another 6-9 months if you go elsewhere and will have to pay the higher AP. It would be daft to do that.