Nigel Farage was in Aberdeen yesterday before heading to campaign in Hamilton.It is often said that the road to a Labour majority at Westminster runs through Scotland.History would indicate that a hefty contingent of MPs from north of the border is a prerequisite for any Labour leader to have realistic ambitions of entering 10 Downing Street.You only have to go back 11 months for proof, with the party claiming 37 of the 57 Scottish seats up for grabs as Keir Starmer claimed a historic landslide victory.That is why this Thursday’s by-election for the Scottish Parliament seat of Hamilton, Larkhall and Stonehouse is so significant.The seat is up for grabs following the death of SNP MSP Christina McKelvie, who won it at the last Holyrood election with a majority of 4,582.A year ago, with Labour riding high in Scotland and the SNP in the doldrums, this would have been seen as a relatively comfortable gain for Starmer’s party.But a lot has changed since last July, with both Starmer and Labour seeing their poll ratings nosedive, due in no small part to unpopular policies like scrapping winter fuel payments for 10 million