The Crowbar was originally the fortnightly newsletter of Brixton Squatters Aid: “initially a freesheet duplicated on waste paper, which became a rowdy class war type magazine that loved to wind up the police, council, lefties and pretty much everyone except the collective.” – Past Tense Publications.
At least 49 issues were published (?) from 1983 to 1987(?). (If you know more – add a comment below).