Southgate secured the Herts-Middlesex Merit Table Seven Cup with a 27-0 win over Biggleswade Thirds.
Keen to make amends for finishing second in the league, Southgate started well and took the lead when Sam Kemp showed quick feet to score in the corner.
James Krestovinkoff added a second in quick succession following a good passing move.
Hugo Lizario-Costa added the third score before the break after using his strength to hold off two would-be tacklers to extend Southgate’s half-time lead to 17-0.
After the restart Lizario-Costa added his second try of the game, intercepting the ball and running three-quarters of the length of the field to score.
The final points were added from a covnverted penalty to seal the win.