Noted. Next time I will be sure to but for now it's still there. I may return during daylight sometime and if I do I'll be sure to take it down.
Most likely it was one of two people in our 'fan club' :) Please rip these up if/when you find them.
While there was no distinct sign of a squatter living in this building, there were a few jackets and unfinished drinks lying around (normal enough for an abandoned place). It was dark at this point so we left, just to be on the safe side incase someone genuinely was upstairs. Attached a photo of the sign in my image gallery (January 2018). Also note that there was some points where the carpet felt like it had no hardwood underneath it and would give out into a basement (?) Watch your step.
Found easy POE, but someone had tried to hide it behind bushes/ propped plywood to conceal it. When we were in the building we heard noises coming from the upstairs level, almost like footsteps but we wrote them off as animals. We moved a bit deeper into the building and found a sign reading 'OAP can suck my balls.' We aren't really sure if a squatter who was fed up with people exploring put this there (maybe explaining upstairs noises) or someone trying to be funny.
All ground level entry points have been cemented shut with bricks. Second level entry seems possible still with some climbing