How does a character that’s spanned years of a writer’s glittering career get given a send off? If you’re acclaimed author Lynda La Plante, then that famous character doesn’t go quietly or without a fight.

Our most famous female detective, Jane Tennison, is being sent on her Prime Suspect way, in La Plante’s final Tennison crime instalment, Whole Life Sentence, which is out now.

The final book ends where Prime Suspect begins, with young Jane leading the murder squad and their hunt for a serial killer.

Getting to know ‘young Jane’ has been a 10-year endeavour for 81-year-old La Plante, given it’s a character she’s taken from her early 20s through to her late 30s.

Helen Mirren as DSI Jane Tennison, a role that won her three consecutive BAFTAs in the early 90sHelen Mirren as DSI Jane Tennison, a role that won her three consecutive BAFTAs in the early 90s (Image: Supplied)

‘Every book on the young Jane Tennison, has taken her through every single problem to the age that Jane Tennison was in Prime Suspect,’ explains the former actress from Liverpool, now a globally famous author.

‘So each book stood up by itself as a story as she went up in rank, and up in rank, and up in rank. And you know, the reason I even wrote the young Jane Tennison was because at an event, a woman said to me, “What was Jane Tennison like as a young girl?” And I had no idea.’

In 1991, police drama Prime Suspect made its debut with Dame Helen Mirren as hard-edged Detective Chief Inspector Jane Tennison.

Prime Suspect, inspired by the experiences of ex-Flying Squad officer Jackie Malton, was a sensation for ITV, catapulting Dame Helen to international fame. Across its seven series the show won six Baftas, the Edgar Allan Poe Writers’ Award and an Emmy for best mini-series.

Whole Life Sentence, the final outing for Jane TennisonWhole Life Sentence, the final outing for Jane Tennison (Image: Bonnier Books Ltd)

In 2015, La Plante brought back the detective in the first of a series of prequel novels as young Tennison, rewinding to the Seventies as the eponymous 22-year-old newbie is drawn into her first murder case.

‘I’d never gone back into what was she like. So it was very interesting to work on,’ says Lynda. ‘And it was nice to go through her personal life, her romances, her failures, and also, by the time this book comes out, she’s reached the level she’s been fighting for her entire career.’

Career milestones are something La Plante has plenty of. In January this year she was named as a recipient of the Diamond Dagger, the highest accolade from the Crime Writers’ Association, where she was honoured for her outstanding contribution to crime writing.

She was appointed a CBE in the 2008 Queens' Birthday honours list for services to literature, drama and charity and has been made an honorary member of the British Film Institute. She is alaos an Honorary Fellow of Liverpool John Moores Univeristy and has an honoraray doctorate from Edge Hill University in Ormskirk.

Getting Away With Murder comes out this monthGetting Away With Murder comes out this month (Image: Bonnier Books Ltd) And her memoir Getting Away With Murder will be published this month.

Born in Newton-le-Willows and brought up in Liverpool, Lynda was a graduate of the Royal Academy of Dramatic Art, and appeared in a number of classic TV series including The Professionals, The Sweeney and Minder.

Her debut novel The Legacy was published in 1987 after she wrote the 1980s crime series Widows about armed robbers’ wives.

‘What you see in the last book is it’s not actually the end, it’s the beginning,’ Lynda says. ‘But my God, that woman fought every inch of the way. So it just swings into Prime Suspect and it’s been wonderful to bring back those characters. I’ve loved it.

‘I’m able to introduce all the characters from the original Prime Suspect. There she is, ready, I’ve made it. And she is met with more discrimination. The misogynistic attitude towards her is unbelievable. It’s unremitting, it never stops. And she gets to a point to say, “I’m going to throw the towel in, I can’t do it”. But something in her says, I will fight you on every single level. And so in the last book, we see the fight commence.’

The farewell to Tennison is one the author ready to say though.

‘In the end, she’d lived with me for an awfully long time and the relief of moving on to other characters like Jack Warr (another detective she created), is good because it means I have to keep on stretching myself over and over again to make something as good.’

Lynda on the red carpet.Lynda on the red carpet. (Image: PA Wire)

Prime Suspect broke barriers on its release, as Tennison battled sexism and prejudice in a male-dominated profession, refusing to be undermined by colleagues who questioned her seniority and ability.

Lynda recalls a meeting with retired detective Malton, who helped her craft the Prime Suspect characters.

‘I was at a literary function and Jackie Malton, who was my guiding light through the first writing of Prime Suspect… she’s amazing. She came up to me and she gave me a hug and said, “You changed my life. Thank you”.

‘It meant so much to me, because I was not the champion saying, I want to make any great forward movement for the women; I had constant mirror images coming at me. You know, they were there. People were coming up to me all the time, I just wrote it down.

‘Sometimes I’ve flicked in a bit of stuff that might be from my own… You know, she’s the most inept person at choosing the good man. And what’s so wonderful is, I know people are reading it saying, “This is not going to work. No, you’ve got the wrong one this time”.

‘I’ve thrown a few of those times of my life in there, but the most important thing for me was to get her real, to be truthful.’

She reflects on the realities of being a police officer, having done her fair share of research over the years.

‘I don’t think you can ever really know what it’s like, how much emotion they have to go through as a police officer, male and female,’ she adds. ‘You can get all the training in the world, but there’s no training for you to be able to control that moment where you knock on a door…. no training to say to a couple, “We have found your daughter”.

‘And over and over again, what used to come back to me were the crimes they had buried but never forgotten. Writing crime is one thing, you can end it and it’s finished. But in real life, it’s never finished. It’s never over.’

* Whole Life Sentence, the final Detective Jane Tennison thriller by Lynda La Plante (published by Zaffre) is out now. Lynda’s memoir, Getting Away With Murder, will be in shops from September 12.