I've just had a builder in to partially board my loft and fit a loft ladder so I can get into it. This is something I've been meaning to do for ages, since it's irritating to have a part of my house which I can't access (even if only to check whether the roof is leaking). So now I have boarding on most of the usable part of the loft, and a nice wooden ladder that hinges up into the loft. (The last part of the job is getting the ceilings repainted in the room with the hatch and also in a room which had some lingering water damage visible from a long-since-repaired roof leak; that happens tomorrow.)
A few photos of loft and ladder here.