Five robots turned up, including KillerHurtz. Just a show and tell, no fighting.
Sorry about the carpet!

Chris Crosskey's Rameses, based around the spring loaded axe from Skarab (cheese on toast!) of series one. Uses series of relays switching the field coils on the motors to control speed. Armour is high density polyethylene.

Jonathan Attias' Rumble. Uses three C5 motors, one for grinding wheels on back, and NCC 4QD controllers.

ORAC, looking a little toasted. You can see the holes made by KillerTron on the far side of the body.
Jim Struts (the walker) in the background - huge!