Heather MillsHeather Mills is reportedly keen to break up Paul McCartney and his new girlfriend Nancy Shevell after seeing photos of the two enjoying a Caribbean holiday together.

The couple, who are believed to have been dating on-and-off since November, have been spotted holding hands and laughing in Jumby Bay, Antigua earlier in the week and were yesterday spotted having an ocean-side yoga session together before diving off a rented pontoon.

An onlooker told the Daily Mail: “It seemed like they’re very much in the honeymoon stage of their relationship because he was impressing her with his diving and she was loving it.”

But a source told the Mirror that Heather is livid about seeing him with another woman so soon after their divorce settlement was finalised, even though it’s nearly two years since their marriage ended: “She went ballistic when she found out. She’s also terrified they’re planning a baby - even though Nancy’s not far off 50 - and thinks another child will detract from Beatrice.”

“Heather’s threatening to call and explain the dangers of dating a Beatle.”

“She had hell with the public hating her and reckons Nancy could too. Heather genuinely thinks she’s doing Nancy a good turn.”