There is an online gallery here.
For the Yes side, I thought by far the most effective poster is No MPs seat should be safe from King & Tuke, which keeps the argument clear and simple. The Yes campaign should snap it up.
But I am afraid that the same agency also win Next Left's political ignorance prize for inadequate research with its "No" effort.
Simon Tuke, creative director of King & Tuke says of his poster Churchill: ""Great leaders have the Marmite factor. AV elects the lowest common denominator".
So what's his Churchill slogan.
"With alternative voting, the losers could win".
Yes, that's Churchill who only once won a majority in a General Election as a party leader. In 1951, when he got an overall majority with 48% of the vote despite being behind Labour, who had 48.8% of the vote in first place.
Even if it wasn't for that inconvenient electoral history, Tuke entirely bottles his point by choosing a man who is now a legendary national hero (winner of 'greatest Britons' no less) and claiming him as a 'marmite' leader. That 'marmite' point would be much better illustrated by Margaret Thatcher (though she'd have got in too, somewhat more constrained, under AV, given the pattern of Alliance preferences in the 1980s).
Of course, that would put off as many voters as it would appeal to. Churchill would be more of a broad consensus majority choice. Which wasn't his point at all.
There's now a rather greater chance our current broken electoral system will pick the wrong winner in future, just as it did for Churchill then.
It's an interesting exercise. It demonstrates the difficulty of gettig voting systems across (I didn't think this 1+2 = 5 or this "man date" made much sense, and wouldn't have been sure whether if they were no or yes arguments without the strapline.
It also demonstrates the political naivety of some ad agencies. We have a Tory-branded poster branding Clegg as a joke and a LibDem attack on Cameron for being fake change.
Some people might think so. But the Coalition partners couldn't possibly comment.
If we flag Churchill offside for being nonsense, I thought that the best anti-AV one was probably the Beacon Brands one on 'the trainee valve tot', which is on the 'if you don't know, vote no' theme.
As its creator says
"An anagram expresses the difficulty in getting our heads around what AV might mean. Why bother to work it out? Just vote no."
Given the difficulty of finding evidence-based reasons as to why AV is genuinely offensive to traditional supporters of the current system, this appeal to ignorance is what much anti-AV advocacy boils down to.
It doesn't deserve to work. The bad news is that it might.