Wednesday 24 January 2007 10.40pm
Try reading this site:
If you still have a problem, arrange a meeting (I think they are near Moorgate station) and take all the information for them to have a look.
Also worth reading your lease yourself to see what the clause looks like. If it is patently unreasonable, I think (but it's a long time since I did property law) that the Leasehold Tribunal can amend your lease.