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Here it is:
No, wait, this one is better:
Or perhaps this one is more symbolic:
On fourth thoughts the most important moment came when Nicola Sturgeon challenged Ed Miliband:
Actually the whole thing could have been about Nigel Farage's errant hair:
Interestingly, the Ukip leader used the widely-shared picture of the four leaders shaking hands with him out in the cold as something of a badge of honour.
Meanwhile, if you were wondering where Nick Clegg was last night...
More: [How Natalie Bennett got the biggest cheer of the debate (so far)]1
More: [How Nigel Farage managed to insult the entire audience in the opposition leaders' debate]2
More: [You haven't seen sad and bitter until you've seen the Lib Dems tweeting during the debate]3
More: [Ed Miliband’s face while looking at Nigel Farage speaks for an entire nation]4