From The Defense Professionals:
08:38 GMT, February 24, 2009 The F-35 Lightning II Joint Strike Fighter is designed to defeat threats that will have been superceded well before this aircraft enters operational service. The performance of the F-35 is suffering seriously from the conflicting design requirements that it was intended to meet. As a result, the F-35 is shaping up to be a technological failure, a delivery schedule and 'affordability' failure, and a techno-strategic failure. This will place Britain in the position of having to look at replacement options, which are extremely limited in view of developing threat capabilities. The question that must inevitably arise is: 'Should Britain Ask the United States for the F-22?'
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My Comment: The U.K. does not have the money to purchase the F-22.