Hi! Sorry for the delay in responding. March for Men is an event entirely organised by Prostate Cancer UK, so 100% of that £10 goes to us. Obviously we have to spend some of it on the cost of organising the event itself – but it's all money that comes to our organisation that we use to help men or to help us raise more funds to help more men. It's not to benefit any other company or organisation.
I hope this answers your question! If you'd like details about how we use donations to fight prostate cancer and support men, you can check out our reports and reviews here: http://prostatecanceruk.org/about-us/reports-and-reviews