One poll today had the SNP taking all 59 of Scotland's Westminster constituencies. Tonight's Newsnight index doesn't go that far, but it does put the SNP on 48 seats, up one on yesterday. It is at the expense of the Conservatives, who the forecast now put at 9 ahead of Labour.
For the course of the general election campaign, Newsnight each evening will be publishing an exclusive Newsnight Index on the likely outcome, based on a sophisticated forecast model. It is produced by Professor Chris Hanretty from the University of East Anglia and his colleagues at electionforecast.co.uk. For more information on how the Index is produced, see here