Just use English stores for price matching, it can be hard work but you tend to get there in the end.
Empire Direct & Sound & Vision often get JL price matched.
edit I've had two pm phone calls from jl since posting the above, thats four pm's so far. Cant recall which jl was the 1st call, my interest wained with the mention of a £70 delivery charge, the second was from jl cheadle, agreeing to pm Sound and Vision on the 42px80 for £729.92. my pm request was for £729.90 so dunno where the 2p came from, S&V price shifting likely, still it was honoured by jl even tho 2p adrift, they could easily have refused it.