Quite. A 20th century thing, IIRC by Gerald Gardiner. It had to be secretive because the Witchcraft Act wasn't repealed until 1951. It was replaced by the Fraudulent Mediums Act!

Edit: I reckon the new age splurge needed that change in the law. Most occult stuff was difficult to lay hands on until well into the 1960s I'm told. There were places like the Atlantis Bookshop and Sorcerers Apprentice in Leeds but even that got attacked by born again Christian arsonists sometime in the 80s.

2nd Edit: I have to correct myself. The Sorcerers Apprentice set up in the 70s. A once fascinating place. Difficult site now.