[2] In 1963 he directed the world premiere of Malcolm Sircom and Neil Wilkie's musical Pardon My Language at the TRL.
[3] Some of the other plays he directed and produced at the TRL included Terence Rattigan's Ross (1962),[4] Keith Waterhouse's Billy Liar (1962),[5] Maria Marten, or, the Murder in the Red Barn (1963),[6] Arnold Wesker's Chips with Everything (1963),[7] William Shakespeare's Richard II (1964),[8] Bill Naughton's All in Good Time (1964),[9] and Joan Littlewood's Oh, What a Lovely War!
[10] In 1965 Williams left the TRL to become director of the Northampton Repertory Company; beginning his tenure directing a stage adaptation of Richard Gordon's novel Doctor in the House.
[13] In 1968 he directed Graham Greene's The Complaisant Lover and Aleksei Arbuzov's The Promise at the Liverpool Playhouse.
[16] As a playwright, Williams created several pantomimes based on fairy tales that were staged during the Christmas seasons at a variety of theatres.