No it doesn't, not by a long shot.
Only about 10% of the MPs in the HoC represent Scottish constituencies, remember, and Labour are consistently polling a popular vote lead north of 20%. Blair annihilated them in 1997 with a mere 12.5% lead. So even if the SNP got nearly all the seats in Scotland like they did in 2015, Labour would still be looking at a very comfortable majority.
( Mr. Tea 'ulmmm'/'mmneurgh', Wed 22 May 2024, 22:35, archived)

We'll need them to save England from Brexit then.
But I am unconvinced that Labour doesn't need Scotland to win a FPTP GE. What has changed since the last three elections to change that?
( brb Monkhouse Stampede, Thu 23 May 2024, 14:38, archived)