Firstly, I really doubt they would do that. Secondly, its not an offence to possess a RIF nor do you need to prove you are an airsofter. The offence is to buy one without a defence, which as we all know doesn't necessarily automatically mean UKARA, its just the most used method. Thirdly, (and being an ex cop myself) I can assure you that the Police have a lot better things to do than respond to a call like that.