Anthony Wells on the ICM shock:
The changes themselves are the margin of error and don’t necessarily mean anything, but I’m sure it will give some cheer to the Conservatives. As ever, it is worth being wary of any apparent change in the trend in the polls until we see it picked up in other polling.
Now, let’s go back to the same period in 1997:
In March 1997 there were nine published pre-election polls and these gave Labour an average lead of 24% over the Conservatives.
Where would Team Cameron prefer to be tonight?