 He made his debut with the RSC at Stratford in 1983, and returned in 1986 to play Joey Percival in Shaw's "Misalliance" at the Barbican.Anthony Hopkins cast him as Willy Nilly in his production of "Under Milk Wood" for the official opening of the AIR Studios at Lyndhurst Hall, Hampstead in 1992, in aid of The Prince's Trust.Hopkins then asked Simon to personally assist him on his film and theatre productions of "August", an adaptation of Anton Chekhov's "Uncle Vanya", moved to North Wales.