The Wisdom of the Crowd (?)

(according to politicalbetting.com)

Labour spreads: IG Index 368-374: Sporting Index 366-370: Spreadfair 367.5-368.2
Tory spreads: IG Index 184-188: Sporting Index 182-186: Spreadfair 186-187.8
LibDem spreads: IG Index 64-67: Sporting Index 65-67: Spreadfair 65.8-66
SNP spreads: IG Index 5.1-5.4 Sporting Index 5.1-5.4 Spreadfair 5 - 5.5
Plaid Cymru spreads: IG Index 4.5 -4.8 Sporting Index 4.4 - 4.7 Spreadfair 4.3 -4.7

Since the prediction of the day revolves around the size of the Labour majority, I'm going with 98, just under the 100 threshold predicted by McNair, though truth be told I would rather it closer to 60...

So of 646 constituencies, plugging percentages into the ever-helpful BBC swingometer until I get some numbers that seem appropriate, I get the following:

Labour - 35.0% - 372
Tories - 31.1% - 184
Lib Dem - 25.5% - 63
Others - 8.4% - 27

So you can be sure that these numbers are wrong. Time will tell.