I've got a flat in an old Victorian building and the bathroom's proportions are troubling me. It's got a ceiling that's 3 metres high and the room is not much more than the width of a bath plus a wash basin. The length of the room is about that of a bath plus a metre.

It has two big windows down one of the long sides and although nice and light it feels very cold and far too high for its size. I'm considering lowering the ceiling.

I did this in my previous place but more for the purposes of putting in some recessed lights and covering the fact that it used to be two rooms, I only lost about six inches of room height in that case. It was done with a wooden framework and plasterboard which I had skimmed.

In the latest case, I need to lose more like 600mm of height and I'm wondering if I should just do the same thing or does anyone have any other ideas?

One issue is that the two large windows go up quite high and I'd need to have some kind of sloped arrangement where my new ceiling meets the window reveals (and the walls are 22 inches thick!)