Mr Allingham is the sole survivor of the Battle of Jutland and has also published his life story.

BBC: UK man is world's oldest at 113

No wonder the capital is such a popular setting for crime fiction, from Margery Allingham to Ruth Rendell.

ECONOMIST: The capital as inspiration for novelists

Mr Allingham joined the Royal Navy Air Service in September 1915 before transferring to the RAF in April 1918.

BBC: UK man is world's oldest at 113

Christopher Edward Allingham was only 36 years old, but he had already spent half of his life working on Wall St.

CNN: [Christopher Edward Allingham]

The oldest is 111-year-old Henry Allingham, who fought in the Battle of Jutland rather than in the trenches like Mr Patch.

BBC: NEWS | UK | England | Somerset | Poem honours WWI veteran aged 109

Mr Allingham became Britain's oldest-ever man in March when he reached 112 years and 296 days, surpassing Welshman John Evans who died in 1990.

BBC: UK man is world's oldest at 113

In the past year, Mr Allingham has been given a doctorate in engineering from Southampton Solent University, been made an honorary freeman of Brighton and Hove and become the "oldest scout".

BBC: UK man is world's oldest at 113

We spent our day in typical Chris Allingham style.

CNN: [Christopher Edward Allingham]