The man, whose identity is being kept anonymous to protect his young daughter, said he was fuming that his teenaged daughter was 11-week pregnant.

“It’s like history repeating itself. I quite like the idea of being the youngest grandad in Britain, but at the same time I’m fuming that she is pregnant,” he was quoted as saying by the Daily Mail.

“I know myself how tough it is being a teenage parent and now she has to go through the same thing. However, we’re all going to stand by her and we will welcome the little one into the family. She is very young, but she was determined to keep the child. We were not going to force her into doing anything else. We don’t want her to hate us,” he said.

“I don’t feel like a grandad. I’ve not got grey hair and my hearing is top notch,” said the man, speaking from his home in South Wales. The man admitted he became a father back in 1996 when he was just 14. His own mother, who is now 47, is excited about the prospect of being a great-grandmother.

“She was 18 when she had me. She was shocked when I told her the news, but she is happy now,” he said.

“Her own mom is alive, and so too is her grandmother, who will become a great-great-great grandmother. There can’t be too many families with six generations alive at the same time.” His daughter became pregnant by her 15-year-old boyfriend and is expected to give birth in August.

The pair are both pupils at the same school and have been seeing each other for several months. In 2006, Tressa Middleton, from West Lothian, became Britain’s youngest mother after becoming pregnant aged 11.