This is mainly stolen from Fultotop's Confluence Mod here but I edited the Xperience XML's to fit this skin in particular
Download is here:
UPDATED: Fixed a bug (XBMC LIVE only) where upper case flags weren't being recognised.
All you need to do is unzip the package into your Xperience folder and merge the 720p and Media folders.
I'm not in any way a graphical kinda person so if anyone has the time/effort to make some flags that are similar to the Xperience media flags then be my guest, I'll edit the file and re-upload it.
The way I get my UK ratings is by scraping my data through Ember Media Manager and changing the settings to scrape UK ratings instead of MPAA.
THIS IS MY FIRST MOD, so I cant really help at all if you guys get stuck but I'm sure somebody in this forum may be able to help if you post your issues.