I have a small patterned, ceiling rose, that I want to fit without losing too much central detail. If I cover the centre with a standard pendant and rose, I'll lose most of the feature. Is there a way of getting around this? Countersinking the electrics above the ceiling rose and threading through the cable? Or is there an option somewhere, to buy a small pendant and rose? I've searched all over and cannot find one!.......Buying a bigger rose is not an option unfortunately.

Ordinary joint boxes need to be accessible, so if you have access from above you could fit a four way joint box above the ceiling and feed a wire down to the light. If you don't have access from above then you could fit a maintenance free joint box in the ceiling void and feed a wire out from that to power the light. Trouble is if anything goes wrong it would be a real problem as, even with CWatters suggestion, it would still spoil the decoration. So I think unless you are really competent with electrics I would get an electrician to fit the maintenance free joint box, it shouldn't be very expensive.

Plus, unless the light fitting is lightweight, you may well need to fix a hook in the ceiling from which to hang the light fitting. So you may need to fix a board across to hold the hook and keep it clear of the wiring.