The website you have listed is I assume a Chinese business with a business operation in the Netherlands. They have “Gel blaster.countryname” sites for many countries. I would avoid at ALL costs ordering from them because your product is coming from overseas and puts you at risk of a VCRA section 36 importation offence. I was going to purchase a MAC 10 from them but did some digging. That being said, you should be absolutely safe buying their VCRA complaint products. As far as I am aware their stock comes from the netherlands.
proof of their NL site identical to their U.K. one.
https://gelwapens.nl/collections/gel-blasters/
their other website, .com based, identical, advertises to the USA: https://gelweapons.com - has different products listed.
As for an actually U.K. based seller, Gelsoft, They’ve got some INSANE mental gymnastics in their sale policy of RIFs, saying that “Home insurance covers activities like back yard skirmishing” referring to the revision of the VCRA declaring insured activities as a legal defense to sell someone one (Lol rite?????) meaning by their logic, anyone could buy a RIF. If I walked into an airsoft shop and demanded they sell me a RIF under that logic, I’d be laughed out the door and they’d probably even put a big picture of me on their wall pulling a silly expression labelled “Moron of the year”.
I wouldn’t touch Gelsoft RIFs with a 10 foot barge pole until the sport becomes more well established and there’s some degree of defacto governing body overseeing its legal status rather than the closest thing british gel blaster enthusiasts currently have; Sellers like that.
The “Skirmishing defense” Applies to sites and activities / organisations with third party liability insurance covering the use of RIFs. There are no gelsoft sites in the U.K. currently operating, as far as I can tell, that allow you to bring your own blasters, meaning in terms of gelsoft, there’s next to no “Defense” for owning one for skirmishing.
UKPSF, as far as I’m aware, operate a database now requiring you to attend paintball games at UKPSF sites before your membership qualifies you to purchase a paintball gun. I could be wrong, but I don’t feel I am.