Your first big electoral test looks set to be the Scottish Assembly elections next year in a part of the UK where for decades your party was totally dominant. Recovering some of the ground lost there to the SNP might be an indicator that a general election victory could be in reach.
The charts above from the Commons Library analysis of the last general election set out in stark terms how Scotland’s Westminster MP party distribution changed dramatically less than five years ago. Labour went into GE2015 defending 41 of the 59 Scottish seas and ended up, like at GE2019,with a single MP.
So from a situation where LAB getting two thirds of Scotland’s MPs was almost a forgone conclusion you start from a base north of the border at the next general election as the fourth largest party. And without that hefty block of Scottish LAB MPs what will soon be your party has to make many more gains in England and Wales.
All this changed, of course, in the aftermath of the September 2014 Scottish IndyRef. Although the vote was to remain within the UK the referendum set off a dramatic rise in the SNP which in May 2015 won all but three Scottish seats.
The overall picture is very daunting for LAB. In September 2015 when Corbyn became leader he declared that Scotland was his first priority. Assuming you become leader you need to do the same but unlike Corbyn you need to make a success of it.