Protection of the approaches to the Clyde needs only to extend by a few 100s of miles off the coast so why have a very small number of shiny jets when a fleet of smaller cheaper ac will do the job. There are lots of options, some of which are true MMA, which can get out to 1000nm on the very rare occasions that is needed.
Culdrose would be a good option along with a forward operating base at Prestwick/ Lossiemouth etc would do nicely. Most of the smaller ac options have less demanding requirements for operating surfaces etc thus operating from small airfields become an option.
Imagine a sqn with high moral at RAF Waddington, its against the rules.