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The latest election polling - in 60 seconds
The 大象传媒's polling expert, Professor Sir John Curtice, explains the clear shifts now showing in the opinion polls.
After showing little movement in the first two weeks of the general election campaign, the opinion polls are now showing some clear shifts.
So what is the overall picture - and who has been gaining support?
Here's the 大象传媒's polling expert, Professor Sir John Curtice, summing up the facts in 60 seconds.
