Douglas maintained their position at the top of EuroManx South Lancashire/Cheshire Division Three with a hard fought 21-5 home win over fellow promotion hopefuls Trentham.
A first half try from Ryan Maddox, plus a penalty from Bryn Snellgrove, gave Douglas an 8-5 half time lead.
Snellgrove added another penalty early in the second half and a Geoff Miles try extended their lead to a comfortable 16-5.
In the closing stages, Douglas replacement Lee Illott picked up a red card for some illegal footwork but the home side closed the game out with a late try to keep their unbeaten position at the top of the table.
David Mullarkey selected by Great Britain for road running championships
Harris wins opening qualifying round at US Open
Michael Dunlop wins Senior Classic TT
Johnny Stewart wins Senior Manx Grand Prix