DURING his interview with Laura Kuennsberg, Dominic Cummings described Boris Johnson's idea to build an undersea connection between Scotland and Northern Ireland as "the world's most stupid tunnel".

The idea for a fixed link between the two countries was proposed in 2018 by Scottish architect Professor Alan Dunlop who dubbed it the "Celtic Crossing".

Johnson backed the bridge idea at the time when he was Foreign Secretary but proposed the idea of a tunnel instead when he became Prime Minister.

READ MORE: Bridge from Scotland to Ireland could create 'Celtic powerhouse'

The connection would be between Portpatrick in Dumfries and Galloway and Larne in Co Antrim and reportedly run around 28 miles, almost the same length as the Channel Tunnel (31 miles) connecting England and France. 

Dubbed the "Boris Burrow" it would reportedly cost between £15 billion and £20bn.

In an interview on BBC 2 earlier this evening, Cummings made a number of major revelations about Johnson's attitudes to the coronavirus pandemic but crucially questioned his ability to lead.

READ MORE: 'The sooner he goes the better': Dominic Cummings blasts PM in BBC interview

Criticising the Prime Minister's priorities, he said: “The Prime Minister’s only agenda is, buy more trains, buy more buses, have more bikes, and build the world’s most stupid tunnel to Ireland. That’s it.”

The tunnel idea was backed by Scottish Secretary Alister Jack, the Tory MP for Dumfries and Galloway, who liked it over the bridge idea due to the effects of weather likely closing the bridge.

In the interview with BBC political editor Kuenssberg, Cummings made his feelings for Johnson clear, who he served as a top adviser until leaving Downing Street last autumn.

Cummings said that Johnson "knew that we basically disagreed about what was happening on Covid and he knew that I was blaming him for not having acted in September, which I was".

Asked about Johnson as PM, Cummings said: "I think the sooner he goes, the better for sure.”

The National: