He is best known for playing Captain William Frederickson in three episodes of Sharpe between 1994-1997 and the role of Chief Inspector Philip Cato in The Bill from 1993 to 1995.
His other television work includes The Brothers McGregor, The Detectives, Peak Practice, Holby City, Bergerac, Boon, Casualty, Monarch of the Glen, Midsomer Murders, G.B.H., Van der Valk , The Young Indiana Jones Chronicles, Waterfront Beat, Dramarama, Wire in the Blood, Foyle's War, Mersey Beat, In Exile, Get Real, Plotlands, A Perfect State, Virtual Murder, El C.I.D.
In 2008, he starred alongside other former The Bill actors, Cyril Nri and Russell Boulter in an episode of BBC1's Waking the Dead.
In 2012, he starred alongside former Bros member turned actor Luke Goss in the feature film Interview with a Hitman (2012) written and directed by Perry Bhandal in which he played the British crime boss Tosca.
[1] In 2016, Whitchurch was cast as the Duke of Gloucester in the Talawa Theatre Company and Royal Exchange Manchester co-production of King Lear.