According to press materials, the play revolves around Keith, who just wants to say he's sorry. A lifetime of drug and alcohol abuse has given him a lot to apologize for - particularly to the two people who raised him from a child. But as the memories of violence, betrayal, lies and recriminations are raked to the surface, it becomes clear that past actions can have shocking repercussions in the present. Harrison, who plays Keith, played Neil Sutherland in three series of Channel 4's "The Inbetweeners," subsequently also made into a feature film. Other TV credits include "The Increasingly Poor Decisions of Todd Margaret," "The Bleak Old Shop of Stuff," "Him & Her," "White Van Man," "Function Room," "The Bill," "Half Time" and "Schizo Samurai Shitzu."

Further casting is to be announced. Playwright Rob Hayes' previous plays include A Butcher of Distinction (King's Head) and Selling Clive (Lost Theatre). It is produced by James Quaife.

To book tickets, contact the box office on 0844 871 7632, or visit www.ambassadortickets.com/trafalgarstudios.