Thanks for the info...
I've already got a household account with my wife and we have 81,011 miles between us + I've just put about £3.5k on my BA Amex card - the points should hit on the 16th July.
I think I will take the risk and wait until mid July...
So, if I am not in so much of a hurry - any ideas on how I could get hold of 15k miles for less than £255?
Cheers,
Nick