Gymnastics - What is BG membership? What is BG membership? Did you know that joining Holborn Gymnastics Club includes becoming a member of British Gymnastics, the national governing body for gymnastics in the UK? Until this year we have sent members’ details such as names, ages and addresses to British Gymnastics to allow them to activate personal member benefits for you, such as insurance and discounts, and to send out your membership pack. From October 2017, to comply with new General Data Protection Regulation (GDPR) we are no longer able to pass on these personal details to British Gymnastics. We are therefore asking all members (or your parent/guardian if you are under 16 years old) to renew your British Gymnastics membership directly on the British Gymnastics website.