The couple, who posted a photo of their new arrival online, are said to have met in a park when she was only 10 and have the lowest combined age of any British parents on record.

At just 12 years and three months old, she is reportedly now the nation’s youngest mother after giving birth last Sunday.

The girl, who cannot be named for legal reasons, was just 11 and still a primary pupil when the baby, who weighed close to 7lbs 4 oz, was conceived.

At 27, the girl’s own mother has become one of Britain’s youngest grandmothers. She accompanied her daughter yesterday as they went to register the birth.