Their "pussycat" spot to support the ITV1 drama Wild at Heart was judged best commercial of the month by David Alexander, the creative director of Isobel.
Runners-up for the Aerial Award, run in association with Campaign, were Stuart Harkness and Darren Wright of Wieden & Kennedy for their Pizza Hut "pole vault" commercial and Robert Messeter and Michael Crowe at Rainey Kelly Campbell Roalfe/Y&R for a Virgin Trains spot called "package".
The winning ad features the sound of what is apparently a female cat.
Her miaows gradually escalate into full-throated jungle-cat growls.
Alexander said: "These were the simplest ads of the month and had the time to do the idea justice."
The winning ad and runners-up can be heard at www. aerialsfoundation.co.uk.