The Dunwich Dynamo takes place this year on July 12-13, the nearest Saturday to the full moon. It starts at the Pub on the Park, 19 Martello Street, London. Although the ride is unsupported, Southwark Cyclists offers a return transport service for riders and bikes; book in advance. More: southwarkcyclists.org.uk. Or Dunwich is about 40km from Ipswich, from where trains run frequently to London. I hired a Trek Madone 3.5 20-speed carbon fibre-framed road bike from On Your Bike London. A helmet, lock and pump were included but it’s BYO tools and inner tubes or repair kit (I also recommend an LED light powered by a lithium ion battery that will last about six hours). More: onyourbike.com.