More than £100 cheaper than internet retailers - with 5 year warranty
Comet have already taken £280.00 off their previous price, making this cheaper than even internet-only retailers (it's the same as the L42D25B). Nearest price is ElectroCentre at £799.99. According to the Panasonic website you can extend the warranty up to 5 years in an offer that started today (http://www.panasonic.co.uk/html/en_GB/Dealers/Viera+5+Year+Warranty/Viera+5+Year+Warranty+T%26Cs/2334117/index.html). They list Comet as a participating retailer.
So the procedure is this:
Reserve after going through Quidco
Go to Comet store and endure in-store demonstration by some spotty erk
Purchase TV and fill in and send Panasonic form
Wait for the 3% Quidco to roll into your account
Smile and enjoy a top-rated edge-lit LED Panny
Hope this helps someone!