A BROTHER and sister will be stepping out together to raise money for Prostate Cancer UK.

Sian, 28, and Aaron Sime, 25, will be taking part in the 100km walk from London to Brighton tomorrow.

The pair have already raised about £800 for the charity, but are hoping to scoop even more by the time they complete the challenge, which they aim to finish in 24 hours.

They are undertaking the challenge because a family member is being treated for prostate cancer.

To sponsor the pair, go to justgiving.com/sian-sime