American cars in the UK - USAF bases?

[C.A.R.]

Something I've always wondered but can't find the answer to; why is there an abundance of USDM cars near to USAF operating air bases?

Well, this is the only connection I can figure anyway? Particularly notice it in Norfolk around the various bases the USAF operate from.

Part of me thinks this must make financial sense for the officers using them, because most of them had been fairly desirable cars or pick-up trucks. However, you also see really bland stuff like Camrys and big Hondas that we don't get in the UK market. Where's the sense in bringing something like that over?

Just a boring Sunday evening observation and a curiosity really. Surely it would be easier to buy a RHD car better suited to UK roads?! Seems mad.