Dexter and Cromwell (Reece Shearsmith and Jonathan Ryland)
IN SERIES: Mike's rivals in the TA. They destroy Mike and Tim's combat robot in an effort to take their place in Robot Wars - but eventually have to settle it at the shadowy underground community "Robot Club" (a reference to Fight Club). Later, Mike earns the rank of sergeant and becomes their superior. In the final episode of the series, they are compelled to assist in Mike's 'bloody spectacular idea' to convince Marsha not to sell the house. Dexter's name and his unpleasant character is a pun of Sinister Dexter.
[Took from server wikipedia.]IN REAL LIFE: