Thomas Markle and Meghan, the Duchess of Sussex. Pictures: Reuters and AP

London – Thomas Markle is ready to testify against the Duchess of Sussex in court, his elder daughter said on Wednesday.

Meghan’s half-sister Samantha Markle said her father would enter the witness box if he was called to give evidence, telling the BBC: ‘If he is called, he will come.”

Legal documents filed as part of a High Court case revealed Mr Markle, 75, was left “deeply hurt” by a message sent by his daughter and Prince Harry in the run-up to their wedding in 2018.

That message and a string of others will form part of a legal battle between the duchess and The Mail on Sunday, after the newspaper published extracts from a letter she sent to her father.

Meghan, 38, has accused the newspaper – the sister paper of the Daily Mail – of breaching her privacy, her data protection rights and her copyright.