They grew in the same womb and were born only a minute apart. Yet Thomas and Harriet Mullineux are not twins.
They were conceived three weeks apart thanks to an extraordinary twist of nature.
Their mother Charlotte had been pregnant with twins when at seven weeks she miscarried one of them. But two weeks later she discovered she was carrying another foetus – conceived separately and still growing in her womb.
The surviving twin and the new baby were born last May and, after a health scare, are now home and thriving.