She is said to have left Prince William broken-hearted when she spurned his affections. Now, Isabella Anstruther-Gough-Calthorpe has ended her four-year relationship with the son of Sir Richard Branson.

"Sam and Isabella are taking a short break to concentrate on their careers," confirms a spokesman for Sam Branson, 25, a budding entrepreneur. "Neither of them believe this is a permanent break-up."

Isabella, 30, an actress, told me that she would work for a charity while Branson would be abroad. "I am staying in London and dedicating my time to Kids Company this summer," she said at the Evian VIP suite at Wimbledon. "I have joined the fundraising team. I think it is good to have another focus apart from acting.

"I am waiting for my police checks to come through, then I can be more involved in the drama side there as well. I am planning on organising lots of summer workshops for the kids to take part in, too."

She added that her latest acting role was an appearance in a horror film alongside Tom Felton, who starred as Draco Malfoy in the Harry Potter films.

"I get to play the heroine who turns into the creature at the end," she said. "It could be even more fun than doing comedy because it is so extreme and so ridiculous with all the blood and guts. I spent about five hours in the make-up chair being fanged up, and full-body creature suit. It was like being a big kid; it was amazing fun."