“I am deeply honoured to have been elected as Leader of @theSNP. I will give all that I have to serve my Party and my Country,” Swinney, who joined the party as a teenager in 1979, said on social media.

He is expected to give a speech later in the day.

Yousaf, who had become the first Muslim to lead a democratic western European nation in March 2023, resigned last week after his decision to end a coalition with the Green Party backfired, triggering a contest to pick his replacement.

Shortly after midday today, the deadline for other contenders to join the race, the SNP confirmed Swinney as the new leader, ending uncertainty around a possible weeks-long process that would have ensued if there were more candidates.

Former finance minister Kate Forbes, who narrowly lost a leadership contest to Yousaf when Nicola Sturgeon resigned as leader, was expected to challenge Swinney for the premiership, but ruled herself out on Thursday.

Forbes had said she and Swinney shared a “common purpose”.

Over the weekend, there were also reports that party activist Graeme McCormick was hoping to challenge Swinney for the leadership, but Sky News reported late yesterday that he had decided not to proceed with his nomination, citing a statement from him.