Someone who was with the rig told us it was definitely 1992, only took us about 10 years to figure out this little riddle! 
A fellow freepartyperson told us about this Bedlam party in an old library in Bromley.
“I was 16 and that was one of my first free parties! The whole calling the number from a phone box and going on a wild goose chase that involved walking alongside a dual carriageway was new to me! It was amazing though. A huge open room with very high ceilings and a very happy time.” She can remember is that it was quite derelict with a load of offices upstairs, and that she saw Lol Hammond (Drum Club) there.
This is what the building looks like nowadays, although much less squished ;D so open in a new window to see it in all its glory:
Does anyone have any (no matter how scatty) memories about this? Leave a comment!