Lee@LPL,
It's symptom of our small island - land is scarce unlike the USA where most airports have 3 or 4 runways 3000+ metres.
I work at MAN and even our two at 3050 / 3200 metres are shorter than many on the continent. LPLs 2292 metres is not bad and you have to consider than on the main departure direction (27) you climb out over the Mersey with no obstacle problems. Take-off weight of an aircraft is highly influenced by the 'clearway' beyond the runway and LPL is well-situated in this respect. There should be nothing to stop 767s going East Coast USA from LPL, after all they do from LTN with just 2160 metres.