I think worth mentioning is that Corbyn and the Labour Party have a problem in getting to 50% that the tories don't have - that 30-50 seats that were previously reliably part of the left coalition vote for a left-wing separatist party (Scotland's SNP).
Part of labour's strategy must be to win back Scotland, and I'd argue that Corbyn has and will continue to be more effective in doing so than some Blairite figure.
It was the Scottish Tories, led by someone who is effectively a Tory blairite, who gained the most in Scotland at the 2017 General election. Current polling has Labour treading water at best. And if the polls are to be believed when it comes to favourability polling Corbyn isn't any more popular north of the border than he is in the rest of the UK.
