@failures art,
Our parliamentary ststem uses first past the post, and as such we've had more or less a two party system since the war. In effect you just vote for the legislative, and the legislative decides on the executive. However, you know who the party leaders are when you vote, so you are indirectly voting for the executive in a general election.
As far as the judiciary are concerned, they're appointed by and large on professional merit. We don't have all the hue and cry over abortion over here, so it's never been an issue.
At the moment there is a coalition government, but I don't know whether or not that gives the government greater legitimacy. The Conservative/Liberal Democrat coalition is enacting policies that were not in either party's manifesto, using the economic meltdown as an excuse. There is a lot of anger, particularly amongst Liberal voters who feel betrayed. The Liberals have tended to be closer to the Labour party than the Conservatives in the past, and the current government is more right wing than Thatcher's.
This is a thread I started on AV at the time.
http://able2know.org/topic/171569-1
Last year there was a move to change first past the post to AV or the alternative vote where you vote for candidates in order of preference, 1,2,3 etc. This was soundly defeated, mostly because people wanted to punish the Liberal leader Nick Clegg, and the referendum was his price for going into the coalition.