Poll of polls for Voting Intention of the Scottish Electorate in UK 2015 General Election:

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.