Hi all
Given the volume of American military and leased-commercial aircraft that routinely pass thru our airspace, then it is surely not a great leap to allow RAF combat aircraft fly in our skies,acting on our behalf.Naturally, the Shinners would have a fit and given our Govt's appeasement of that lot, no armed Brits will sully our green isle's skies.As for leasing,a good example would be the British Army Air Corps, who lease all of their helicopters from Westlands(or whatever they're called these days).Previously,the RN leased F-4Js from the USN until their own F-4K/Ms were ready.
regards
GttC