London’s Alleys: Underhill Passage, NW1

This is a busy alley off Camden’s main shops that has a long and at times confusing history.The alley runs east-west off Camden High Street and leads to Underhill Street behind. So you’d assume from the name, that the passage was built at the same time as the street, and it was — but it wasn’t called Underhill Passage, and neither as it happens, was Underhill Street.
Underhill Street was originally called Clarendon Street, while Underhill Passage used to be called Pleasen