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Caesars Cafe, AV, Twitter and Lembit

David Cornock | 10:17 UK time, Tuesday, 19 April 2011

It's a tough job, but someone's got to do it. Somehow, it fell my way.

So I found myself at seven o'clock this morning at Caesars Cafe in Barry trying to explain the alternative vote to an expectant nation.

Explaining how AV works can be a challenge in broadcasting. Some of the BBC's greatest brains, and me, have been struggling to find an appropriate gimmick, sorry visual metaphor, for TV audiences.

So I turned to Twitter in the hope that supporters and opponents alike would give their views concisely within 140 characters.

Here's a summary of the response:

@CharlotteV: "Many have tried, and many have failed. Have not yet seen AV described in 140 chars"

@moronwatch: "Have yet to see FPTP defended coherently anywhere"

@bjhallett: "Rank candidates by preference, candidate has to get 50% of votes, lowest goes out & next pref counted till 50% reached"

@SimonThomasAber: "AV is the same as first past the post except the goalposts move as you count the votes"

I do hope that helps. Tonight, I shall be trying to explain it for a Wales Today audience, this time with an added Welsh angle.

It's difficult to predict how seats would change hands in future elections under AV, as voters' second preferences may change and political parties may campaign differently.

But academics have tried to look at how AV would have made a difference during the last campaign. The British Election Study found 43 seats would have changed hands a year ago, including five in Wales.

In Cardiff North, Labour's Julie Morgan would have held off the challenge of the Tories; Labour would also have held Aberconwy, won by Conservative Guto Bebb. The Liberal Democrats would have taken Swansea West and Newport East from Labour and in Montgomeryshire, Lembit Opik would have survived the Tory challenge.

Never mind changing the course of political history, AV could well have changed the world of celebrity television as we know it today.

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