Her new partner encouraged her to join a writers' group at the Phoenix Theatre, Leicester, in 1978, when she was in her early thirties. Initially too shy to speak, she did not write anything for six weeks, but was then given a fortnight to write a play. This became the thirty-minute drama Womberang (1979), set in the waiting room of a gynaecology department. At the Phoenix, she became the writer-in-residence.  During this time she was mentored by several theatre directors including Ian Giles and principally Sue Pomeroy who commissioned and directed a number of her plays including Womberang, Dayroom, Groping for Words and subsequently Ear, Nose and Throat. She was also introduced to William Ash, then chairman of the Soho Poly (now Soho Theatre), who likewise played a significant part in shaping her early career. She met writer-director Carole Hayman on the stairs of the Soho Poly theatre and went on to develop many theatre pieces with her for the Royal Court and Joint Stock, including Bazarre and Rummage and The Great Celestial Cow. They later co-wrote two television series, The Refuge and The Spinney.  At the time of writing the first Adrian Mole book, Townsend was living on the Eyres Monsell Estate, near the house in which playwright Joe Orton was brought up. Mole "came into my head when my eldest son said 'Why don't we go to safari parks like other families do?' That's the only real line of dialogue from my family that's in any of the Mole books. It's in because it triggered it. I remembered that kind of whiny, adolescent self-pity, that 'surely these are not my parents.'"

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