Here's the link
http://www.empiredirect.co.uk/content/products/details/index~modelcode~PKG-SON-KDL40D3000U-3.htm
Here's the codes you need to enter when you add it to your cart.
Code: EM3694
Username: 10percentoff
Click update basket when you've entered the codes, however it looks like it has no effect on the price on the price as nothing changes, all you then need to do is proceed to checkout and the discount should now be showing.
Do you have an empire direct card? This is how you get the 3 year warranty, if not and you want the warranty, you need to add the card to the same basket as your TV and it will then show you have a 3 year warranty on the checkout page.
Take a look at it - you don't need to purchase at that point and also there's some other offers on which a few people on here are going for.
Hope this helps?