When you move into your flat take photo's of any tyre marks on the stair well walls and have them dated at the post office. That way when a 'older' neighbour who must be very busy comes up to your 3rd floor flat (from the basement flat) for the first time in a year you can tell them where to go.
Apparently it must be us because we've been seen with bikes, apparently it's not likely to be anyone else in the stair, despite being stood next to somebody else's sh*tty BSO whilst telling me this.
Evidently my flat mate and I are going to ding our £2k + bikes off the walls everyday, unlike the rest of the punters and there £50 apollo's.
(She also had the cheek to suggest we were drinking on the streets the other day when going out to a friends 2 doors down for dinner with an open bottle of wine from the previous nights dinner)