It's not often you see Jeremy Corbyn getting "ratioed" on Twitter, but today's attempt to paint the SNP as the architects of Margaret Thatcher's rise to power has kicked off a massive boorach.

Complete with clips of the Ravenscraig steelworks destruction, the snappy clip stuck out on Jeremy Corbyn's account blamed the SNP for voting against Labour Prime Minister Jim Callaghan in a 1979 vote of no confidence which he lost by a single vote.

But the bid, aimed at boosting a languishing third place Scottish Labour party, fell flat with First Minister Nicola Sturgeon who clapped back at Mr Corbyn, tweeting: "Dear Jeremy Corbyn - instead of talking about things that happened when I was eight years old, how about showing some leadership today? You could start by asking yourself why the polls show you still trailing behind the most incompetent Tory government in our lifetimes."

Ouch.

SNP MP Chris Law also tagged in below the line, accusing Labour of sitting "on their arses" when MPs voted last week on a second referendum amendment, cheerfully telling the Labour leader to "jog on".

Apart from kicking off a vicious Twitterati row between the cybernats and the Corbynistas, it's hard to imagine this red-tinted history lesson is going to get many people below the age of 50 fired up to vote for Labour.