Participants in this annual fundraiser for Maggie's Cancer Caring Centres, in association with Open House London, choose between a ten- or 20-mile hike through late-night London, with exclusive access to some iconic buildings (including City Hall, RIBA, the Royal Geographical Society and Horse Guards) as well as food and entertainment (including gospel choirs, artists and the opportunity to have a massage), along the way. For the first time this year, ten-and 20-mile participants will be able to take part together, allowing friends and family members of differing abilities to walk together for the first ten miles. Maggie's programme of support empowers people to live with, through and beyond cancer. Maggie's Centres are for anyone affected by any type of cancer, and for their family and friends. See the website for details and for more information about the Night Hike.