Great advice, the sales man in currys asked me how far away from the tv i was viewing it from. I told him and he said "dont" go bigger than 47 inch, 50 inch would be absolute maximum. I thought bigger was better, but when he explained the reasoning, it made sense. So i'm going to buy this today i think.
http://www.currys.co.uk/gbuk/panasonic-tx-l50em5b-full-hd-50-led-tv-17825818-pdt.html