I'm running the Hull 10k and giving sponsorship to HHCP.

HHCP give advice, support and companionship to those currently or potentially homeless in a number of different ways.  I'm sure they'd appreciate any support you can give to help get people back on their feet and in a safe home.  

Donating through JustGiving is simple, fast and totally secure. Your details are safe with JustGiving - they'll never sell them on or send unwanted emails. Once you donate, they'll send your money directly to the charity. So it's the most efficient way to donate - saving time and cutting costs for the charity.