"17.3 Members of a rifle club, miniature rifle club or muzzle-loading pistol club approved
by the Secretary of State or the Scottish Ministers may, without holding firearm
certificates, have in their possession firearms and ammunition when engaged as
members of the club in, or in connection with, target shooting (section 15(1) of the
Firearms (Amendment) Act 1988 as amended by section 45 of the 1997 Act). It
should be noted that section 15(1) does not stipulate that the firearms must be club
firearms. A member of an approved club may temporarily possess a firearm solely
in connection with target shooting on the club’s range, or other ranges which it may
use."
Above from the Home Office website. I would very strongly suggest though that if this is excercised, it is with a signed letter of approval from the club secretary (along with their mobile number), plus the above text and web page.