Just ask one of the officials at the club. They will know. Be careful if you are a triathlete. Tri Clubs are affiliated to the BTA which is not the same as UK Athletics. Some Tri Clubs are affiliated to both BTA and UK:A.
Please note that ARC – the Association of Running Clubs is separate and is not affiliated to UK Athletics. Some clubs are affiliated to both ARC and UK Athletics.
Please note that your club’s affiliation to UK: Athletics does not mean that you qualify for the £2 discounted entry fee for a race. To get this you need to be BOTH a member of a UK Athletics affiliated club and to additionally hold a EA registration number / competition licence. This requires a £5 fee on top of your basic club membership fee.