A try from England centre Will Greenwood 27 minutes into the match was to be the only five-pointer of the afternoon, with Australian fullback Nathan Williams adding three second-half penalties to extend their lead after Paul Burke had converted the touch down.
The Exiles' sole answer as far as the scoreboard was concerned was the boot – Barry Everitt stroking an early penalty. It was however to be the last minute before they registered their next score, a late penalty from Mark Mapletoft not enough to get them even a bonus point from this fixture.
London IrishPens: Everitt, Mapletoft
HarlequinsTry: GreenwoodCon: BurkePens: Williams 3