Mark is a love interest for Kat Moon. He first appears on 14 October 2011, when he is delivering alcohol to The Queen Victoria public house, of which Kat is a landlady. Mark tries to flirt with Kat but she tells him she is married. Mark later appears in the local nightclub, R&R, where he tries to chat up Kat, this time succeeding and they have a one-night stand. The next day he returns at the Queen Vic and reminds her about the previous night and Kat refuses to serve him and makes Mark leave. The next day he continues to phone her, but she rejects his calls.
It was reported that Kat faces temptation from Mark when she goes through marriage problems with her husband, Alfie Moon, after he accuses her of having an affair.