We're here to help - Scoutese in Plain English:
SL - Scout Leader - the person in charge of the Scout Troop;
Prefixes: G(SL) - Group (Scout Leader) - co-ordinator of the Beavers, Cubs, Scouts [& Explorers];
Prefixes: C - Cub - i/c Cub Pack; B - Beaver - i/c Beaver Colony; E - Explorer - i/c Explorer Unit;
Prefix: A - Assitant - someone who helps the Leader.