Here is the authorised exit poll:
Lib Dem 10
Plaid Cymru 4
This is the Exit poll – which is normally very accurate. It is rather different from the Banbury Man poll - http://thebanburyman.blogspot.co.uk/2015/04/the-banbury-mans-2015-general-election.html
If this is accurate, then the Tories and SNP have outperformed all expectations, and Labour and Lib Dems have both done much worse than expected. Everyone will be surprised by this. Watch this space.