Yes to own an Airsoft gun you need to become a UKARA member. Normally to become one you have have played 3 Airsoft days and been doing it for more than 2 months. Membership can be had through the Airsoft venue you go to.
OR you can buy a second hand gun off Zeroin.co.uk forums, some guys don't bother asking for UKARA.
This information is incorrect and subversion of the system in place can be seen as illegal.
You don't need to be a member of the UKARA scheme, you need a defense against the VCRA. Read through the thread as i've covered it a couple of times. UKARA is one of the easiest methods to achieve it, but some sites don't support the scheme and in more remote areas there aren't an abundance of sites to choose from so you may be stuck with one that doesn't support it.
L33 how do you find the CO2 WE? is it open bolt or closed? i bought an open bolt v3 CQBR start of the year, gun is amazing but seriously let down by the mags. I've taken them apart and re-sealed just waiting for them to go off to test. Also waiting for the Ra-Tech NPAS valve to arrive but i can't for the life of me find the steel trigger box or bolt carrier.
Have considered Co2 but using it in January the mags had sheets of ice on and still fired with propane and the Co2 ones are more expensive.