It is now 76 years since the inspiring tale of Bletchley Park codebreaker, who put aside his personal pain to defeat the Germans.

Daisy Lawrence was a former accountant clerk who deciphered enemy messages in top secret between Japanese, Germans and Italians.

She showed incredible mental fortitude as her soldier fiancé Stanley was missing in action following the fall of Singapore in 1942.

Later, it was revealed that he had been arrested and was being held in an awful Japanese PoW camp.

Daisy Lawrence (pictured) was working as an accounts clerk when she was recruited for the top secret role due to her maths skills

Daisy Lawrence (pictured) worked as an account clerk at the time when she was promoted to a top-secret position due her mathematical skills.

Daisy was recruited to be a codebreaker because of her mathematical skills. She kept her work secret from family members for many years.

Jan Slimming’s and Jill Robertson discovered the truth about their mother’s death only when they were going through their moms belongings.

The couple discovered correspondence, papers, and newspaper cuttings that were related to her time in Bletchley park, Buckinghamshire’s home for World War Two codebreakers.

It was so captivating to Mrs Slimming that she published it in her new book, ‘Codebreaker Girls: The Secret Life at Bletchley Park’

Bletchley Park was her next stop to learn the whole story of her mother’s experience there.

Daisy kept her work a secret for years after the Second World War, even keeping it from her own family

Daisy kept her secretive work from others for years following the Second World War.

It was then that she learned from Daisy, the Bletchley park codebreakers, how they had gathered over 18,000 transcripts during the period leading up to D-Day. This provided vital information for the invasion.

Mrs Slimming is a former publisher living in Atlanta, Georgia. She said that her mother claimed she was a file clerk at the Atlanta office. This information was all they knew for years.

She actually took six weeks of a secret course to learn the basics and techniques for codebreaking, including German Enigma intercepts.

However, her training was not enough to qualify for the section in which she would intercept Japanese communications. This includes communication from Japanese diplomatic embassy offices, including Germany, and Italy.

“The encrypted messages were found in the JN group ciphers, Japanese Naval codes. Her assignment to Hut 7 was to her Naval Section to deal with Japanese intercepts.

‘After my mom died in 2006 my twin sister found newspaper cuttings, Foreign Office documentation, and photographs of anonymous persons hidden.

It was only after her death that her own daughters, Jan Slimming and Jill Robertson, found letters, documents and newspaper cuttings about her time at Bletchley Park, the home of the government's World War Two codebreakers in Buckinghamshire. Pictured: Daisy, second from left in front row

Jan Slimming’s and Jill Robertson were only able to discover letters, papers, and newspaper cuttings that she had written about Bletchley, Buckinghamshire, home of government codebreakers during World War Two. Pictured in the front row: Daisy, 2nd from left

“From there I wanted to find her Second World War Story.”

Stanley and Daisy first met 16-years-old when Stanley was working at Tooting Co-operative, South London.

Following the war she was employed by the Foreign Office, in Westminster’s diplomatic section.

Later in her life she worked as an office worker until retirement in the 1990s.

Stanley passed away in 2001. She was 89 years old when she died.

Sir Dermot Turing is the foreword to the book, his nephew who broke the Enigma code.

He wrote: “What makes Codebreaker Girls unique is the personal element.

“The main character of Bletchley Park is Daisy Lawrence.

“This richly colored approach with Daisy’s archival material allows us to directly see what it was like for a young Bletchley woman.”

It has been estimated that the work done by the Government Code and Cypher School (GC&CS) at Bletchley Park, Bucks, shortened the war in Europe by more than two years and saved over 14 million lives.

Codebreaker Girls: A Secret Life at Bletchley Park, by Jan Slimming, is published by Pen & Sword and costs £25.