A letter from my landlord's agent, informing me of a rise in rent, sent me looking for my tenancy agreement to see if they were allowed to. The agreement was (probably) somewhere in an unsorted stack of papers contained in a couple of shoeboxes. Not the best way of keeping track of paperwork, I'll admit.
I took the opportunity to have a clean-out and file session, and now feel accomplished. I also found a stack of wet and dry sandpaper I didn't know I had. Maybe next week I'll clean out my wardrobe.
Oh and it turns out they are allowed to increase it. Damn.