|Voting Intention of the Scottish Electorate for UK 2015 General Election|
Individual points are poll results. Poll results are centred on the midway point of a poll, so if poll was taken from the 11th to the 13th it will be placed at the 12th. Point size is a rough indicator of the sample count of the poll.
The lines are an exponentially smoothed sample count weighted moving average. The Scottish part extracted from a UK wide poll with only 150 usable samples will have a lesser effect on the moving average than a poll of Scotland with 1000 samples.