Professional swimmer Mark Foster and Harlequins rugby stars Karl Dickson, Sam Smith and Seb Stegmann are supporting Terrence Higgins Trusts's new World AIDS Day campaign, Stand Up, Stand Out.

The sportsmen are encouraging the public to 'stand out' in red underwear and wear a red ribbon for World AIDS Day tomorrow, as well as donating £2 to the sexual health charity to raise funds and support those living with HIV.