The SNP has called for a two-year extension to the Brexit transition period due to the coronavirus emergency.

The party's Westminster leader Ian Blackford urged other opposition parties to back the call, which would see the transition go beyond its scheduled end date of December 31.

In a letter to party leaders, Blackford outlined the plans, and said: “The ongoing emergency caused by the Covid-19 virus is, and must remain, the sole focus of our collective efforts, and it is right that all other political agendas are paused as we deal with the priority of saving lives and protecting people’s incomes.

“In that context, I believe now is the right moment to unite as opposition parties in Westminster in seeking a two-year extension to the Brexit transition period.

READ MORE: Refusal to extend Brexit transition period raises 'chilling prospect' of no-deal, warns Ian Blackford

“That strong, united opposition stance would also send a powerful message to our European friends and partners, who we know are favourable to the logic and sense of this request.”

He argued the UK government wants to impose a disastrous hard Brexit or a no-deal Brexit at the worst possible time.

At Prime Minister's Questions last week, Blackford said threatening to impose Brexit in the middle of a global pandemic would damage jobs, businesses and the economy.

He called for the UK government to "embrace commonsense" and agree to a two-year extension.

He commented: "The UK government is recklessly gambling with our economic future by threatening to impose a devastating no-deal Brexit or a bad-deal Brexit in the middle of the biggest health and economic crisis of our time.

"Opposition parties must join the SNP in supporting a Brexit extension, and call for Boris Johnson to show some leadership - he needs to face down the hardliners in the Tory Party and agree to a two-year extension to protect jobs, businesses and living standards.

READ MORE: Ian Blackford tells Boris Johnson to stop 'blind Brexit dogma' and extend Brexit transition for two years

"In the previous Westminster parliament, parties and members from across the House of Commons co-operated against a no-deal Brexit. I am asking them, once again, to join with the SNP to ensure that a reckless Tory Brexit isn’t imposed during this health emergency.

"The UK is already facing a hammer blow from coronavirus - with warnings the economy could shrink by 35% and two-million people could lose their jobs. Many businesses are struggling to survive - the very last thing we need is the additional threat of a no-deal or Tory hard Brexit, which would isolate and damage our economy further."