Since 1969, BBGs have been drawn from local schools. Traditionally, Wandsworth Boys School in Sutherland Grove, Southfields and Mayfield Girls School on West Hill in Wandsworth, both now defunct, were the schools of choice for selection of BBGs. This was possibly owing to their proximity to the club. Since 2008 they have been drawn from schools in the London boroughs of Merton, Sutton, Kingston, and Wandsworth, as well as from Surrey. BBGs have an average age of 15, being drawn from the school years nine and ten. They serve for one, or if re-selected, for up to five tournaments, up to year thirteen.