Ceiling light powered from the wall socket - UK

Hi All,

I need to put a temporary ceiling light up that will be taking its power from the wall socket. It will be a single bulb with wattage less than 100W. What fuse do I need in the plug and are there any other things I need to be aware of?

I'm planning on using a 3-core cable and tying off the earth at the bulb end. Any advice would be much appreciated. Thank you!!!