Christopher Preston's first play, a gay romantic comedy, stays just the right side of cute as it tells the story of David, a newly single 45-year-old who is enjoying playing the field - well, Hampstead Heath.

Hitherto, David has made a career out of being left. But now others keep wanting to move in, such as Paul, a naïve 24-year-old, and Mike, with whom David enjoyed a brief sexual encounter in a Turkish bath 20 years ago.

Preston's play is gently entertaining without being really funny, and while he has steered well clear of gay stereotypes, he doesn't avoid female ones: David's best friend Diana only avoids fag-hag syndrome due to a sterling performance from Alison Edgar. But Preston's central character has all the charisma of a chartered accountant. Alan Mosley gives David his best shot but the dialogue only starts to sparkle during the encounters between the mercurial Mike and the spiky Diana.

The evening has more naked bottoms than it really needs, and the plotting is pretty preposterous. But it has a disarming quality that sends you away smiling. It also has a nifty set from Janet Bird that encompasses both Hampstead Heath and David's kitchen-diner. All in all, a promising contribution for this year's London New Play Festival.

• Till November 27. Box office: 0171- 373 3842.