I have been looking for a good price on this TV for a while as I am looking for a TV with built in Freeview HD & Freesat HD, and BT Shop has recently brought this down to 399.99, which makes them the cheapest beside Richer Sounds.
But they have a special Offer on certain LG TV's (incl. this one) giving you another 10% on top of the already discounted price. The code is SPRINGTV0417, valid until 10/04, and it brings the price down to £360. Postage to UK Mainland is 3.90 on top of that.
You can also get 4% Quidco on top of that, making it potentially less then £350. That's IMO a very good price. Most other places are still charging 449 for it right now.