Jeremy Corbyn addressing the Unite union's Scottish policy conference in October. Since then, a poll suggests the Labour leader’s popularity rating has dropped 23 points and turned negative

Labour’s “Corbyn bounce” is over north of the border, according to a poll showing that not only have his approval ratings slumped in Scotland but support for the party is falling too.

The research reveals that voters are also turning against independence and Nicola Sturgeon’s desire to hold another referendum. Only a third, or 36 per cent, want another vote on the constitution in the foreseeable future while 57 per cent want Scotland to stay in the UK, up one point from October and two points from the referendum result in September 2014.

The first minister will draw comfort from the poll, which suggests that the SNP is still comfortably ahead of its rivals, in terms of both Westminster and Holyrood elections. She will, however,