Long Buckby and Banbury shared the Under-11s tournament, which was played before the Saints' Aviva Premiership Rugby match against Newcastle last October. Meanwhile Welwyn lifted the Under-12s title after winning the tournament played before the home game against Sale Sharks in February.
The teams will be celebrating their hard-earned victories at Saturday's Aviva Premiership Rugby Final. The excited young rugby players will parade around the pitch at half-time in front of a crowd of 82,000 rugby fans.
Commenting on the support of the Land Rover Premiership Rugby Cup, Laura Schwab, Marketing Director of Land Rover UK, said: "We are thrilled that the Land Rover Premiership Rugby Cup is proving to be such a success and continues to build in momentum and profile for what is now its fourth year. It is a significant initiative which provides a unique opportunity for young players to channel their enthusiasm for the sport and to play in a national tournament.
"Land Rover's commitment to rugby covers every level of the game, from Rugby World Cup 2015 through to the Land Rover Premiership Rugby Cup, and we are committed to supporting the development of the young players of the future."