Be gentle its my first post but i bought the TX-P42S20B this morning from M&S and just went onto amazon to read the review and spotted a better deal than the M&S one.
Recently posted as an offer under M&S (now out of stock) Amazon have just put it on for £499.95 and also allowed a further 10% off taking the price to £450 its about £30 cheaper than the M&S offer. to get the price add code TNWEEK43.
Probably only bad point is that it may not include the 5 year warrenty the M&S deal offered.
However for anyone that missed the M&S deal heres another one.