So i managed to fit my motorised number plate holder yesterday.  Very happy with it. (Cheers Tarmac  ). 
  
Guide to be added shortly but his a quick video for now: 
  
 
 
  
Okay here's the guide.  To be honest it's a custom job to fit this rather than a direct bolt-on.  It took me about 4-5 hours to fit but i was taking my time. 
  
Tools needed: 
Angle Grinder 
10mm socket 
Screwdrivers 
Drill 
Metal drill bit 
Jigsaw 
  
Additional Materials: 
Metal bracketing 
Self tapping screws 
Small