This year's Silverstone Classic will include a Celebrity Challenge race, with the famous faces racing each other in Morgan sports cars.

Well-known names include Jay Kay (without which no such race would be complete), Heston Blumenthal, Hollywood actor Sir Patrick Stewart, 'Comedy Dave' Vitty from Radio 1, Sky Sports presenter Vicky Gomersall, Brian Johnson from AC/DC, Strictly Come Dancing's Brendan Cole plus Wimbledon TV presenter Andrew Castle.

The latest name to be added is Julia Bradbury from Countryfile, who is driving in aid of the Bobby Moore Fund for Cancer Research as well as the Birmingham Children's Hospital and the RPJ Crohn's Foundation.

"My mother had bowel cancer last year and has just been given the all-clear so it is a cause very close to our hearts as a family. It is a treatable cancer if caught early so well worth shouting about," she explained. "I'm doing this race for my Mum and for women!

Meanwhile Olympic skier, Chemmy Alcott, said, ""When I took on the boys on the ski slopes they didn't really like it so I want to see if the same applies on the race track. I've been clocked at 92mph on a downhill run, but I'm planning to go a lot quicker in the car. It's a fabulous opportunity to have some fun and raise money for charity at the same time. I'm so excited about being a racing driver for the day – it's just going to be an amazing experience."

The Celebrity Challenge takes place on Saturday 21 July as part of the world's biggest classic motor racing festival. Qualifying takes place at 15:50 in the afternoon, followed by a 20 minute race at 18:25 in the evening.