raz.org.rain eh, that's far too simplistic. London certainly doesn't have colder winters than Liverpool or Glasgow for example, and summers in Leeds/Hull/Sheffield etc are warmer than summers in Plymouth or Swansea (in terms of average highs at least). The average high at my nearest station is 21.4C in July, which is on par with Birmingham even though we're about 100 miles further north. Hull has average highs of 22.0C in July which is higher than Bristol - I bet very few people would expect that to be the case but it shows how being further east in the UK is often better than simply being further south (being further south and east is obviously the best bet).
You could argue that the SE quadrant of the UK is more continental though, especially East Anglia and Kent (though more historically than currently as Kent in particular has become pretty rubbish for snow since the 90s & the decline of midwinter easterlies).