I need to change a bulb in a ceiling downlighter in a bathroom. I've twisted the white ring off which I thought would get me to the bulb but there seems to be another ring I need to move to get the bulb out and I can't get it to shift.
There is a black sort of rubbery cover with CW on one side of it and CW on the other; when I move the rubber bit there seems to be a tiny switch but I have no idea what that's about.
There's no spring clip or similar so I am assuming it's a twist but I cannot get it to shift and I don't want to force it in case I'm missing something and break it!
Any ideas?