Rear Indicators

Hi All,
I wonder if anyone can help? I have a 300tdi Disco and both my rear indicators have stopped working suddenly. I have tried changing the bulbs of course but nothing happened. I've looked at the fuse box but I can't see any fuse that have blown. Any ideas as to what it can be and how to fix it? Any help would be much apprieciated.

have you checked the fuse box under the bonnet??

Hi,
Yes I have, have you any idea which fuse it is? or is there a seperate fuse somewhere else? or can you tell me where the flasher unit is and could it be that?
Many thanks