His main interests are football (he once had trials for Leyton Orient
Football Club) and music (he plays the guitar and drums).
Ranked #17 in the 100 Greatest EastEnders (1985) Characters of All Time for his performance as Billy Mitchell (2015).
As of 2020, he is the 3rd-longest serving actor in the history of EastEnders (1985) (behind only Adam Woodyatt and Steve McFadden), having played the character Billy Mitchell for 22 years (from 1998 onwards).
Has been friends with Cathy Murphy since he was 21; they did not start working together until almost 30 years later when Murphy landed the role of Julie Perkins, an old flame of Fenwick's character Billy Mitchell, in EastEnders (1985).