Thank you all for your advice and support in this matter.
I have just recieved an email from the sales executive. He has passed the matter onto the new car sales manager. The reply states that they are unfortunately able to offer any more than the £500 discount making the AP £2299.
So it appears the sales manager has been no help at all.
I am contemplating my reply – I’m thinking of paraphrasing glos guy statement ‘unless you honour the AP at the time I ordered the car which was £1749, I would like to speak to the dealer principle prior to esculating this complaint to BMW UK’
I really have never complained about anything before and its really not in my nature to do so, Im not sure I have the health to actually pursue this matter to BMW UK, but maybe the threat would be enough??