I thought it looked like Wiscombe but only looked at this year's entry. I have since found Hanauer's own description online and he says:
I built this a few years ago, having been inspired by a car built by Frank Bacon and his man Greenwood in 1946 from Rudge engine, Austin 7 chassis and axles and Triumph steering. Affectionately christened RATBAG (Rudge, Austin, Triumph, Bacon and Greenwood).