Wimbledon Rugby Club were too strong for Old Colfeians in the London One South running out 46-15 winners.
A brace of tries from Dave Charles, and scored from Myles Stringer, Ed Lewis, Dan Brown and Charlie Morgan – along with a Brown drop goal and 13 points from the boot of Neil Hallett did the damage.
Wimbledon, now third in the table, travel to fourth-placed Dover this weekend.
Old Rutlishians picked up their first win of the Surrey Two season, beating Law Society 46-26.
Rich Parsley (two), Jake Gordon, Sean Conor, Dan Smith and Kieran Mcauley got the tries. Old Ruts host CL London on Saturday.
In Surrey Four, Merton beat Old Oundelians 21-14 – tries from Liam Hayhoe (two) and Kieran Hayhoe, and two Luke Tabb penalties secured the win.