The 12&U matches start in September 2019, dates will be uploaded soon.
4 Players are required for each match.
Match Format: 4 singles and 2 doubles games. Each match is 2 full sets with a Championship tiebreak (to 10) at 1 set all.
Match fees are £5 for away games and £7.50 for home games (the fees are to cover the league entry fee, balls and match teas).
A link to the guidelines:
All above content (match data) provided by LTA British Tennis