Skipper Mark Soden was inspirational as London Scottish made it two derby wins in two weeks on Saturday.
Following last Saturday's victory over Richmond, Scottish extended their unbeaten run in National Three (South) with a 25-17 win over Rosslyn Park.
James Brown opened the scoring with a penalty, and was on hand to convert when Ian McInroy sliced open the Park defence for the opening try.
Park took advantage of Andrew Fahey's sin-binning for Scottish to pull back a try through James Strong, which Dylan Pugh converted, and shortly after the break, Pugh levelled matters with a penalty.
But Park's joy was short-lived as ex-England Sevens scrum-half Simon Amor dived over from the base of a scrum, and Brown added the conversion.
And Scottish seemed to have secured the points when Roman Piotrowski went over in the corner, followed by a drop-goal from Brown.
But Park refused to lie down, and John Swords put in Nick Canty to pull a try back, and Pugh's conversions brought them to within two scores.
However, it was too-little, too-late for Park, who host Henley next Saturday, while Scottish travel to Canterbury.
ALSO in National Three (South), Richmond went down 28-19 at Henley Hawks.
Tries from Ed Rosa, Kris Green and Alistair Simmie were not enough for Richmond, who host Chinnor on Saturday.
Club spokesman Andrew Gordon said: "Inevitably,it will take time to integrate this number of new players and a new coaching team.
"But possession will have to be guarded more carefully if we are to compete at this level."