Walk London events are run over three weekends a year, in spring, summer and autumn. They provide over 40 free guided walks in different parts of London. Funded by Transport for London, the walks are organised by the Walk Unlimited organisation. Walk Unlimited is a social enteprise, operating all over the UK, whose aim is to get more people walking. Its work is supported by Local Authorities and public health bodies.
The routes and timings of the walks are published on the Walk London website (linked to below) three weeks before each walk. There is a facility on their website to subscribe to a free email newsletter with details of forthcoming walks.