Rothwell was made a prisoner of war during World War II after being shot down over Norway. It was during this period, while incarcerated in Stalag Luft III, that he started to write. Peter Butterworth was in the same camp and the two became firm friends, working on camp concerts with Rothwell mostly writing and Butterworth performing. These concerts helped to relieve the boredom of camp life and the noise helped cover tunnelling escape efforts.[1]
Peter Rogers liked Rothwell's writing so much that he asked him to become the Carry On staff writer; Rothwell went on to write a further nineteen Carry On films.[1] He took the series into a more lewd and bawdy direction from that of Carry On's first screenwriter, Norman Hudis, but was careful never to stray into pornographic territory. He saw the films as a continuation of music hall entertainment, Max Miller being a hero of his.
Rothwell also wrote several Carry On TV specials for Christmas,[1] and co-wrote Up Pompeii! starring Frankie Howerd.
Rothwell was awarded the OBE in 1977 for his services to the cinema industry. In the mid 1970s he retired due to a prolonged illness. He spent his final years in Worthing, and died aged 64.
In April 2007, Rothwell's line "Infamy! Infamy! They've all got it in for me!" (delivered by Kenneth Williams as Julius Caesar in Carry On Cleo) was voted the greatest one-liner in movie history by a thousand comedy writers, actors, impresarios and members of the public for the launch of the Sky Movies Comedy Channel.[2] Rothwell "borrowed" the line (with permission) from Frank Muir and Denis Norden, who had used it on their radio show Take It From Here.[3]
