The Saturday Street is our NEW weekly series in which we unlock the stories behind the names of London's famous thoroughfares. It's compiled by London Walks guide Karen – listed by Travel + Leisure magazine as The World's Greatest Tour Guide. You can find Karen on Saturdays guiding her Old Westminster and British Museum walks. If you've got a London street query or suggestion, email Karen at the usual address
Cold Bath Fields EC1
Location: Clerkenwell
Named for a famously grim prison, which in turn took its name from a nearby well from the late 17th century. The Cato Street conspirators, a group who tried to murder the PM Lord Liverpool and all the cabinet in 1820 were held here before transfer to The Tower.
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