Victoria Jones / PA Images
Gary Goldsmith pleaded guilty to one account of assault by beating, after punching his wife Julie-Ann in the face.

Gary Goldsmith pleaded guilty to one account of assault by beating, after punching his wife Julie-Ann in the face, after a drunken argument in a taxi outside their central London home, in October this year.

Goldsmith is the youngest brother of the Duchess of Cambridge’s mother Carole and attended the weddings of both his nieces The Duchess of Cambridge and Pippa Middleton.

The prosecutor Kate Shilton told the court that Mrs Goldsmith fell down after her husband threw what was described by their taxi driver, Daniel Shepherd, as a “left hook”. It was also revealed in court that, when the taxi driver challenged Goldsmith over his actions, he then became aggressive towards him.

Mrs Goldsmith was knocked to the ground unconscious for 15 seconds before waking up and staggering to her feet, the court heard.   After the attack Goldsmith was described as “panicked and walking in and out of the house, trying to get her to go back in the house”. Mrs Goldsmith asked Mr Shepherd to call the police.

Goldsmith will be sentenced on 21 November 2017.