potshotting UK surveillance cameras? (Score 1)

So, I know the UK is not exactly the US in terms of handgun availaibility, but are air rifles or paintball guns allowed? If so, why isn't potshotting surveillance cameras more popular? Seems like a very low-tech, low-cost approach to defeating what are probably high-cost installations. (Even if the actual cameras aren't too pricey, the unionized labor running the cherry-picker certainly is)