Just to let you all know that I have fixed the issue with my passenger side headlight. Good old ebay had a brand new ballast unit for £45! Better than main dealer price!!! Emailed the seller and he has a few brand new spare units available. Have a look if you need one!
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MESELX:IT&item=280302800531
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&ssPageName=STRK:MESELX:IT&item=280302800531