What to do when you’re struck by just how different two pieces of data are? Why, draw a graph of course. Hence this, triggered by the very differing picture of Liberal Democrat fortunes told by the latest YouGov and ICM polls:

Liberal Democrat ratings in all the published YouGov and ICM polls since the 2010 general election, dated by first day of their fieldwork
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RT @markpack New from me: How ICM and YouGov compare http://t.co/QTvxCZZ
RT @markpack New from me: How ICM and YouGov compare http://t.co/A2ySXaL
New from me: How ICM and YouGov compare http://t.co/WEvl4hp
New from me: How ICM and YouGov compare http://t.co/WEvl4hp
Brilliant chart from @markpack on ICM vs YouGov http://t.co/R3POLGB
How ICM and YouGov compare: http://t.co/17C9qef
RT @tlittleford How ICM and YouGov compare: http://t.co/t22aVTv
RT @tlittleford How ICM and YouGov compare: http://t.co/G0nB406
How ICM and YouGov compare: http://t.co/qQaqylv < Interesting graph showing differences in the trend of LD support between the 2 pollsters.