This one seems to have been added in to the 75% off WHSmith sale. For free delivery select 'deliver to store' option.
'Breathtaking air combat simulator developed in conjunction with aerospace industry giant Lockheed-Martin and several air force divisions'.
Price greatly varies on all websites but most have it around the £20 -£30 plus mark. Only Amazon have it close at £9.95 and Sainsburys £8 something.
And don't forget 7% cashback at Quidco and TCB