IIRC, stations are only entitled to maintain one ‘gate guardian’ at public expense. Marham has three, and (like all military establishments these days) has a plethora of issues to address with its domestic infrastructure. A lot of time and energy has been put into keeping the Victor presentable over many years but there is only so far that voluntary effort can take preservation without the injection of cash. And the arrival of F-35 has (rightly) made access to the Station much harder, with enthusiasts mostly limited to the excellent off-camp Heritage Centre. If, as I suspect, it is a question of money then it’s an easy decision to get rid. People first.
Silly question I'm sure, but beyond the occasional lick of paint what maintenance does a gate guardian actually need?