Labour lead at 1: Labour 33%, Conservatives 32%, UKIP 16%, Lib Dems 8%, Green 5%.

There is precious little change in this week's opinion poll aggregate, with Labour remaining on 33%, the Conservatives on 32%, up 1 from last Sunday, UKIP are down 1 on 16%, and the Lib Dems and Greens remain where they are on 8% and 5% respectively.

All changes are very small and within the margin of error. Looking at all of my weekly polls, a remarkably consistent picture emerges. The Conservatives and Labour remain within 1% of 31.5 and 33.1% respectively, with UKIP hovering around 16-17% and the Lib Dems and Greens hovering around 5-8% respectively. As I have said before, it isn't about any single poll, but the underlying aggregate trend, as can be seen here.

There was speculation that infighting within Labour over Miliband's leadership over the last week would harm Labour. On the face of it, it doesn't seem to have made much effort. Voters already had their doubts about Miliband-Simply enhancing these doubts does not seem to have made much of a difference to Miliband's prospects.

The weekly regional extrapolations will be published on agorans.org (The think tank I now work with) where I will publish an extended analysis alongside other polling data tomorrow. It will use regional extrapolation data from every poll in the last two weeks, giving a total sample size of over 2000, and therefore being more accurate than any single poll can be.

 Now, time to move on to some more topical polling news. A poll of Rochester and Strood earlier this week showed that Mark Reckless looks to be heading for a comfortable win. The Ashcroft poll showed UKIP on 44%, with the Tories on 32%, Labour on 17%, the Lib Dems on 7%, and the Green Party on 3%. Looking at a graph of all opinion polls taken in the constituency, the underlying trend looks quite clear:

I have already talked about what the likely implications of such a result could be in this blog post. Yesterday, the Daily Mirror quoted senior Tory backbenchers, who said that Mr Cameron could face a no-confidence vote and leadership challenge if UKIP managed to win by a big margin. It looks as if Thursday will be an extremely interesting night. Could this be the knockout blow for Mr Cameron? We will have to wait a few days to find out.