If you bought it on eBay, it's probably fake. DVD Identifier will tell you TYG02, but that doesn't make it authentic. Have a look at the center ring for a serial number starting with "GG" or "GD" (I forget what a TYG02 should have). If you don't see that, it's not real Taiyo Yuden.
For a good source in the UK, the recommended site seems to be www.svp.co.uk