There's more to north London suburbia than Ikea and the North Circular – well, that's what Open-City (run by the folks behind Open House) is suggesting. Jump on your bike and explore the relics of a rural Middlesex and architecture from the inter-war years. The tour is led by David Garrard of English Heritage. Meet outside Hampstead Heath Overground station. The walk is approximately 3 hours long and ends in Barnet. Participants must bring their own bike.