If, as you say, you are going to go to Trojan's Weir Mill site in Stockport, they have a shop in there which has G&G M4s amongst other things, they have decent face protection and stuff like that as well. Prices are pretty good, and of course it means you can have a nosey at them up close. I'm fairly sure that if you went there regularly, they'd sell your parents a RIF without all that UKARA bollocks even though they are part of the UKARA scheme, because a UKARA number is only a means to check if people are skirmishing regularly, which they'd know you were doing if you'd been there a few times. Also, if you attend regularly, you automatically become a member, with a card, so that in itself is effectively a pretty reasonable means of proving your suitable defence for possessing a RIF.