London's streets have tales of invention and discovery around almost every corner. This guided walking tour around the homes and haunts of scientists and inventors has those stories coming thick and fast. Some famous names from history will be featured - but my specialities are unsung heroes and lesser known sites. The tour includes diverse topics from the comic to the ghoulish, and from the domestic to the cosmic. Particles to spectacles, surgery to cookery, submarines to helicopters. My walks are aimed at the layperson and any accompanied children and pets who enjoy history or science. The walk will last about 2 hours, finishing near Trafalgar Square. Find more details: information, conditions, accessibility etc, on my website www.laurenceswalks.co.uk .