Bought my Finlux from my local Euronics dealer. Mercury was the local FH dealer but now unfortunately closed. Worth hunting one down as customer service is excellent.
Finlux is their own brand but developed from the Finlandia brand which was the 'bees knees' years ago. Got a free 5 year guarantee and same day installation. I was in the shop at 11.15 and it was delivered 2 hours later. The chaps installed it, tuned it in and connected all the DVD players etc., and removed the old very heavy 28" CRT TV for free, which places like Comet charge for.
Maybe not the cheapest but they offered to price match a more expensive set which I decide against as it only had the usual 1 year warranty.

They also offer a similar same day service for washing machines and fridges.