Hiya
Mr Happy is correct, so long as you have 'basic' lamps, and the wiring internally is rated for 240V you just need to change the plug on the end to a UK one and off yer go.
Nowadays pretty much all lighting has cabling which meets the higher voltages standards/ratings so that there's no difficulties in exporting to different parts of the world. We've done this with lamps that were from India for instance, although to be on the safe side, I re-wired the internal wiring myself.
As for electronics, well pretty much everything will work here ! the most notable exceptions being Visual equipment, TV's, Camcorders, Projectors, Playstations etc as they use the NTSC video standard. You can get around it by buying Multi System/standard equipment though. Everything else, Laptops, PC's, Monitors, Cell/Mobile phones (most, not all) digital cameras, PSP's & handheld gaming systems (not all again)Ipods & MP3 etc etc all work here and usually amounts to just finding a cheap £2-3 plug type adaptor to plug into. Some items may require a transformer though.
there's quite a few topics/posts about this sort of stuff.. have a breeze through and see if any of it applies to the electronics you have ..
cheers!
DtM! West London & Slough UK!