UPDATE: THE GUARDIAN:
The full data are more revealing. Here are the key points.
• Farage won by an even bigger margin amongst those actually watching the programme.
The raw figures were 65% saying Farage won, and just 28% saying Clegg won. But YouGov found that those actually watching the debate contained a disproportionate number of Ukip supporters. It weighted the results, to make them politically representative of the UK as a whole, to produce the 57/36 figures.
• Those judging Farage the winner included 69% of Conservative supporters, 42% of Labour supporters, 20% of Lib Dem supporters and 30% of those in favour of staying in the EU.
• Farage's victory only made a slight difference to the number of viewers saying they favoured leaving the EU.
Before the debate 42% of those polled favoured withdrawal. Afterwards it was 44%, with 47% favouring staying in.
• Farage's approval ratings went up noticably during the debate, from 40% of people saying they had a positive view of him beforehand to 52% afterwards.
Clegg's ratings also went up, but by less, from 31% to 35%.
VIDEO HIGHLIGHTS HERE.
COMPLETE DEBATE HERE.