The Worshipful Company of Scientific Instrument Makers is one of the modern livery companies. We are a charitable community of makers and users of instruments who include scientists, engineers, academics and students. We come together to share knowledge and experience; influence opinion; and enjoy good fellowship.

WCSIM Walk – Effra River SIM Walk

On Saturday 3 October 2026, Twenty-one SIM members, joined Martyn for his latest fascinating walk, following the route of the Effra River, through the history of Brixton, across Kennington and Vauxhall, down to the Thames.