Southgate made it five wins out of five in Middlesex County League Division Two.
They saw off Harrow by seven wickets on Saturday.
There was also a winning draw for Enfield in the same division.
However, Winchmore Hill are back at the bottom of Division One.
They went down to Hampstead by eight wickets, after being bowled out for just 74.
Northampton Exiles are still top of Saracens Herts Division Four after an impressive 40-run victory over Hertingfordbury.
Go to enfieldindependent.co.uk/sport for cricket reports.
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