In reply to climbtim:
I think it's not so much the lack of interest as the extra hassle of working out some way of protecting the wall from getting overly trashed and the extra paperwork for safety, plus the loss of wall space for normal climbers.
Probably the best you can do at the moment is get some Fig Fours or similar and ask the wall if they mind you using those. You might be restricted to bouldering laps, but that'll still get you pumped. The Castle has a Fig Four circuit up, and there's usually compatible holds on offer in the Westway's circuit room.