Hi

I have a very silly (but hopefully easy) question. The lightbulb in my
bathroom light has blown, and I need to replace it - but I can't figure
out how to remove the cover for the light fitting! I've only recently
moved to the UK, and I'm wondering if maybe you use a fitting type here
that I'm not used to - it won't unscrew, it just turns and turns and
turns. I don't see any catches or anything, although there is one spot
where it looks like you might put a coin or a screwdriver in, maybe to
pry the cover loose; but it doesn't seem to do anything, and I'm
worried about breaking it.

Any ideas? There's a sticker on it saying that it's made by Powerlite,
and looking at www.powerlite.net it looks like their Decordrum, which
mentions a snap on diffuser, but doesn't give any clues on how to take
it off.