Again - it was never banned! The movie was withdrawn (with the press congratulating itself on a job well done and slogans like, "The Daily M***** has banned this filth!" which weren't exactly true) and shelved for a few years. It was hard to obtain a copy of the film during that time as it wasn't on general release on VHS, but it wasn't illegal to sell a copy.
That said, the VHS and cinema versions were cut in places... have a look on the melonfarmers.co.uk for more info...