John Lewis are currently price matching the Panasonic TX-P42V20 with Lakes at £799 in store (High Wycombe). You also get £30 off a JL TV stand making it £70 if bought at the same time. Fair price for this TV as long as you don't hit the probelms some folks have, and you have the option to return it if you get a bad one plus a JL 5 year warranty.
The price is fair - it's the JL guarantee that makes the difference.
It's last year's model and they have a few hundred left - when they're gone they are gone.