Purley John Fisher leapfrogged rivals Weybridge Vandals with a comfortable 33-3 win on home territory.
The Vandals have been the early pacesetters in London Division Three South West, leading the way for much of the campaign, but they have dropped to fourth while Fisher are second, seven points off the leaders.
Fisher had slipped to a 40-9 defeat in the return fixture earlier in the season but now move above Vandals and into second, keeping the pressure on leaders Winchester.
Phil Jones, James Quigley and Ben Inglis all crossed the whitewash while Johan Malcom floated all conversions over, as well as scoring four penalties.
The Old Coulsdon outfit travel to third-place Ellingham & Ringwood on Saturday, kick-off 2.15pm.