It's ShelterBox's 20th Anniversary this week (20th-26th of July) and myself and the team of ShelterBox brand ambassadors from around the UK are all doing 20 miles of walking, cycling or running as part of the ShelterBox #20for20 challenge. On Tuesday, Helen Jarman and I will be walking 20 miles of the Hampton Court to Albert Bridge Thames Path route. Right now, more than 88 million people around the world have been made homeless by natural disaster and conflict and ShelterBox are working to change this.