On 11 November 2008, marking the 90th anniversary of the end of the First World War, together with Harry Patch and Bill Stone, Allingham laid a commemorative wreath for the Act of Remembrance at The Cenotaph in London. Allingham was invested as a Scout on 18 November 2008, 100 years after he first joined as a youth. He said he was only able to spend six weeks with his local group as a boy. Allingham celebrated his 113th birthday on , at an event hosted by the Royal Navy. He received a signed birthday card from First Sea Lord Sir Jonathon Band and saw a Mark 8 Royal Navy Lynx flying overhead while he was sitting outside in his wheelchair. When asked the secret of his long life, Allingham said, "I don't know, but I would say, be as good as you possibly can."