To get registered on the UKARA database you should ask your site for an application form. They will complete the section confirming your membership. You then take that along to an airsoft retailer and they can add your details to the UKARA database. But note, only a Retailer can add you. Once you are registered, your site can then update / renew your membership after one year if you continue to be a member, but they cannot add you to it unless they are also a retail member (e.g. F&O sites have a retail arm, so they qualify as both site and retailer).