But Sean Carr, a cobbler and key cutter, is to wed Evgenia Tymoshenko, the daughter of the billionaire Ukrainian Prime Minister.

Evgenia’s mother, Yuliya, became a heroine in Ukraine after she led the Orange Revolution against Leonid Kuchma, the country’s unpopular and autocratic former President.

Ms Tymoshenko was swept to power alongside Viktor Yushchenko and became known for the rousing speeches she made to her followers, who spent weeks protesting against the Government in sub-zero temperatures.

Mr Carr, a tattooed singer who plays in a heavy-metal band called Death Valley Screamers, closed his market stall in Leeds and moved to Ukraine after meeting his future wife in a bar in Egypt.

The improbable romance began when Miss Tymoshenko, 25, asked for Mr Carr’s number from his friend, who initially asked for payment in return. By the time he relented, Mr Carr had returned to Britain.

Miss Tymoshenko, who studied at the London School of Economics, sent Mr Carr, 36, a text message on her return to London and they arranged to meet at a biker festival. But it was only when Mr Carr visited her flat in London that he discovered that she was the heiress to a multibillion-pound fortune.

He told the Yorkshire Evening Post: “I still didn’t know about her mum, but she seemed to be living in an awful lot of luxury for a student.” Five months after they met and the Orange Revolution was at its height, Mr Carr visited Ukraine. Yuliya Tymoshenko was leading the opposition movement alongside Mr Yushchenko, who is now the President.

The day after Mr Carr arrived in Ukraine he stood on a stage in front of thousands of people as his future mother-in-law called for Mr Kuchma to resign. She was appointed Prime Minister six months ago.

Mr Carr said that he was initially terrified of his fiancée’s mother, but now calls her “Mama” and has moved his customised Harley-Davidson motorcycle and 11-stone rottweiler, Salem, to Ukraine.

“I know it’s mad,” he said. “I can’t really believe it myself. It’s just bizarre. It has been a big adjustment for me but I am making it. I am picking up some Ukrainian and have formed a rock band.”

Yuliya Tymoshenko said that she was delighted by her prospective son-in-law. “He is an excellent person,” she said.

The wedding will take place on November 2 and the venue is believed to be in Yorkshire.

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