Well, it's a bit more complicated than "he said, she said" as the issue would be raised at the moment. The budgeting policy for the police forces is the same as the speed cameras: loads of flashing pillars (£4k each) but only a handful of camera units (£14k each) on a rotation in the area. West Sussex only has 12 cameras lol. 12!!!!!!! Similar mentality towards the speed-gun tripods: save money, don't buy them. There's a few but certainly not 1 for each speed-gun. I did hear a police officer say, and he may or may not have been a friend of mine (cough cough), that he'd never even seen a speed-gun tripod! Go firgure.
The operating instructions for a speed-gun state that for an accurate reading the gun must be fixed to the specified tripod. And if anyone wants proof of that then they can google it.