Well I didn't want to say as I didn't want to jinx it until it was a done deal but I've paid the deposit to secure it now so it's going no where. I managed to get the exact car I want:
Blue, IS300H F-Sport, Premium Nav and Full Leather
65 plate, 7K miles on the clock form a Lexus dealer so Warranty, Assured etc. all in for £27,147
Personally I think this is a good deal and worth the money.