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The BBC Radio Wales presenter said: “Gabriel’s influence was like moving from a black and white world into one of technicolour.
“I don’t think until I got older I realised what an effect he had on my life. He affected my life forever.”
Carol stepped back into the house she used to live and spoke to Gabriel’s son Arthur - her step brother - and his son Tino, Tino’s son Joel and Arthur’s wife Elaine.
The mum-of-two said their dad was “loud and funny” and she “worshipped” him.
Carol Vorderman visited her step father’s family in the latest instalment of Closer To Home (Image: Getty Images)