I found Philip and his creation, "Bandit" playing outside the cathedral in Bath, England. Bandit is a unique musical machine of Philip's design which allows him to play a guitar-like instrument entirely with his feet, while he simultaneously plays a fiddle in the normal way. Philip uses his left foot to choose one of about 10 chords on the guitar, and his right foot operates a foot-pedal with flywheel that constantly strums the guitar. From what I could tell the strumming pattern alternately hits the two top strings and then the bottom four, you'd have to make a mechanical alteration to change that pattern.
Step 1: How it works
I've annotated the photos with an overview of each part of the BandIt - just what i could figure out from watching it and asking Philip a few questions. I've also included a video of Philip and BandIt in action.