Buster is counting down to the London Marathon on 13 April

Working plumber Buster Martin ran Sunday's Roding Valley half marathon in Essex in five hours 13 minutes, and is now focusing on London's 26-mile event.

On finishing the run, the first words of the ex-member of rock band The Zimmers were: "Where's my beer?"

Mr Martin, who has 17 children, started work at Pimlico Plumbers in London three years ago because he was bored.

He drank a tankard of ale before signing autographs and chatting to fans near the finish line of the Essex race.

'A revelation'

Charlie Mullins, managing director of Pimlico Plumbers, said he was "amazed" when Mr Martin appeared at work on Monday morning after his exertions.

He said: "I was amazed and delighted, he turned up on time and set to work polishing the vans. He's a revelation."

Mr Martin's trainer is marathon enthusiast Harmander Singh, who helped Fauja Singh, 96, break the London marathon record for the over-90s.

Buster, who lives in London, made headlines last year when he signed up as an agony uncle for men's magazine FHM, offering guidance to a younger generation.

He also found fame when The Zimmers, who had a combined age of more than 3,000 years, scored a hit single last year with a cover of The Who's My Generation.