Mike is Steve's Mum Janet's straight talking partner. He already knew Janet before they started dating; his son was a school friend of Steve's.
He made his first appearance in Series 2 Episode 3: The Get Together. Mike and Janet went for dinner at Steve's flat to meet Becky's parents.
Upon arrival he immediately made Steve uncomfortable by asking if he minded the fact he was having sex with his Mum.
Mike did not hit it off with Becky's family; asking Laura if she knew what Paul really thought of her after she does some crude and racist impersonations and calling Nigel a "fucking twat" after he insults the dinner Steve prepares.