Cheryl, Nicola Roberts, Kimberley Walsh and Nadine Coyle reveal latest update in honour of Sarah Harding's breast cancer battle.

"We couldn't do this without Sarah," says the new Young Women's Breast Cancer Fellow researching the disease.

'It’s hope, it’s progress, and it’s a promise that her fight will help protect future generations' ...

'It's a promise that her fight will help protect future generations of young women' ...