British election with two-round system

[minionofmidas]

Belfast South, obviously.
Quite a number of seats in Scotland outside the Central Belt, most likely.
And if people don't vote tactically in teh first round because it's two round anyways (think the last French presidentials), you could have some really bizarre results in Scotland, Wales, and Northern Ireland.

[minionofmidas]

Come to think of it, all of the "True Blue" area would be a mix of Blue and Orange. If Labourites turn up for the second round of voting, that is.