Reg Dean from Wirksworth in Derbyshire is today celebrating his 110th birthday as Britain's oldest man.
Born in Tunstall, Staffordshire, in 1902, Reg Dean served as an army chaplain during the Second World War.
In his 110 year's, Reg has seen many great changes: air travel developed from the Wright Brother's first flight in 1903, to the first person on the moon in 1969.
He's also witnessed two world wars, five monarchs and 22 prime ministers.
Reg has been alive 40,150 days.