THE SNP’s Westminster leader says Dominic Cummings “must resign or be sacked” after revelations he flouted lockdown rules to stay with his parents in Durham while sick with Covid-19.

The Prime Minister’s top adviser was found to have made the 250-mile trip from London with his wife, who was also sick with the virus, so his parents could take care of his son.

Coronavirus guidelines state a person with symptoms should self-isolate for seven days in order to prevent the spread of the virus.

Cummings has defended the trip, which he made at the end of March when only essential travel was permitted in England, and has said he has no intention to resign over the incident.

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However there is widespread anger over the news – and Ian Blackford is at the forefront of calls for the controversial figure to leave his role immediately, accusing him of “wilfully disobeying” his own government’s rules.

This morning, after appearing on BBC Breakfast and Radio 4’s Today programme, Blackford wrote on Twitter: “It is now clear that Boris Johnson has serious questions to answer over the Dominic Cummings cover up. When did he find out? Did he sanction rule-breaking? Why wasn't Cummings sacked? Why was the public kept in the dark until newspapers broke the story 8 weeks later? #coronavirus”

He went on: “As Dominic Cummings has failed to do the honourable thing by resigning, Boris Johnson must sack him and answer for his own role in the Tory cover up. This a question of leadership and judgement. There can't be one rule for the Tories and another for the rest of us.”

The LibDems are also calling on Cummings to resign or be sacked over the journey, while Labour is demanding an explanation into the trip.

A joint investigation between the Mirror and the Guardian unveiled the story last night, which contradicted previous Downing Street claims that Cummings was self-isolating at his London home.

Police confirmed they had spoken to the owner of a Durham property where somebody was staying who had travelled from London to the area.

A neighbour said they had seen Cummings in his parents’ garden while out on a daily walk on April 5. They said they heard Abba’s Dancing Queen blasting playing loudly and peered over the hedge where they saw him, wearing a scarf and thick coat, with a small boy running around.

The neighbour, who wanted to remain anonymous, said: “I got the shock of my life, as I looked over to the gates and saw him.

“There was a child, presumably his little boy, running around in front. I recognised Dominic Cummings, he’s a very distinctive figure.”

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They added: “I was really annoyed. I thought it’s okay for you to drive all the way up to Durham and escape from London.

“I sympathise with him wanting to do that but other people are not allowed to do that. It’s one rule for Dominic Cummings and one rule for the rest of us.”

If anyone was found breaking rules during lockdown at that time they could be fined £60 for the first offence, halved to £30 if it was paid quickly. It would be doubled on each offence after that, up to a maximum of £960.