After dillient research I have failed to find a connection between Biscuithead and the Biscuit Badgers, as featured by Genevieve, and Half Man Half Biscuit other than the twice-cooked commestible itself - Bicciepedia etc.

I remember driving down the M6 with the children in the back, listening to Radio Stoke on Trent to get the traffic news, and the 'disk jockey' kept referring to CDs - they were probably rather novel at that time - as biscuits. "Cracking biscuit that!" he'd enthuse after every track. It became a catchphrase in our house for a while.