After writing in secret from the age of 14, Townsend first became known for her plays, her signature character first appearing in a radio drama, but her work soon expanded into other forms.
She enjoyed great success in the 1980s, with her Adrian Mole books selling more copies than any other work of fiction in Britain during the decade.
The earliest books recount the life of a teenage boy during the Thatcher years, but the sequence eventually depicts Adrian Mole in middle age.
Both the earliest Adrian Mole book and The Queen and I were adapted for the stage and enjoyed successful runs in London's West End.
Her mother bought a collection of Richmal Crompton's Just William books at a jumble sale which Townsend read avidly.
Townsend left school at the age of fourteen and worked in a variety of jobs including packer for Birds Eye, a petrol station attendant and a receptionist.
In Mr Bevan's Dream: Why Britain Needs Its Welfare State (1989), a short book in the Counterblasts series, she recounts an experience from when her eldest child was five.
She later recounted that it was the start of her writing which became the Adrian Mole books, looking at life through the clinical eyes of a teenager but in a comedic manner.
While employed as a supervisor at an adventure playground, she observed a man making canoes nearby and, because he was married, put off talking to him; it was a year before he asked her for a date.
[11][12] 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.
'"[13] The first two published stories appeared in a short-lived arts' journal entitled magazine, in the editing and production of which Townsend was involved, featuring the character then still called Nigel Mole.
Actor Nigel Bennett had given her help and encouragement to persist with the work and sent the script to John Tydeman, the deputy head of BBC Radio Drama.
[17] The Growing Pains of Adrian Mole (1984) was reputedly based on her children's experiences at Mary Linwood Comprehensive School in Leicester.
Several of the teachers who appear in the book (such as Ms Fossington-Gore and Mr Dock) are based on staff who worked at the school in the early 1980s.
Michael Billington writes that Townsend "was ahead of the game" in treating the royal family as a suitable subject for drama.
[22] In 1989 Townsend published Mr Bevan's Dream – Why Britain Needs its Welfare State, one of the series of Counterblast essays written by such authors as Paul Foot, Marina Warner and Fay Weldon which critiqued, either directly or indirectly the social consequences of Thatcherism.
[23] The book consists of a series of short anecdotal stories which touch on ways in which the welfare and education systems of the day supported or (mostly) failed ordinary citizens.
In "The Quick Birth", Townsend recalls the experience of giving birth to her first child, born prematurely but who survived thanks to the dedicated National Health Service staff at her local hospital in Leicester; "Community Care" deals with the treatment of vulnerable people with mental health issues; "Mr Smith's privatised penis", the final section, is a dystopian satire on a future where pavements, sunlight, fresh air and even lovemaking have been sold off to private enterprise.
[28][29] Surgery was carried out at Leicester General Hospital and Townsend spoke to the BBC about her illness on an appeal for National Kidney Day.
[26][31] Stephen Mangan, who portrayed Adrian Mole in the 2001 television adaptation, stated that he was "greatly upset to hear that Sue Townsend has died.