And you're certainly not going to have the whole squadron heated because that'd be one expensive bill for the government. A full squadron of Lightning's would be up long before a squadron of MiG-25s.
Fourteen aircraft a piece, two on QRF that are warmed up (not the Lightnings, they don't need to be.), the O aircraft would be up. The crews would be pulling the rest of the squadron out of the hangars and such (RAF squadrons actually had another two on stand-by, but not in the Q hangar)...now the MiGs sit there for 2-5 minutes warming up...while the Lightnings are just piling on to the runway and only lack of room on the runway is what's stopping them taking off quicker.
So, NATO attacks a Soviet MiG-25 base ...it meets two straight away...then breaks through and destroys the base while the rest are warming. VVS attacks a Lightning base, it meets two straight away ...breaks through...and then there's another twelve coming at them. Actually, if it were Binbrook...there's two squadrons and a LTF with T-bird Lightnings that also have full combat capability.