The co-leaders of the Scottish Greens have been criticised for snubbing a service of thanksgiving for the King.

Patrick Harvie and Lorna Slater - two of essentially the most outspoken republican MSPs in Holyrood and Scottish Government ministers - confirmed they won't attend the particular service to mark Charles's Coronation at St Giles' Cathedral on the Royal Mile in Edinburgh tomorrow.

Mr Harvie will as an alternative converse at a rally exterior Holyrood organised by the anti-monarchy group Our Republic.

The Scottish Conservatives accused the celebration, which is in coalition with the SNP, of "student politics".

Scottish Tory structure spokesman Donald Cameron mentioned: "This stance is absolutely typical of the Greens’ student politics and Patrick Harvie’s attention-seeking announcement that he’ll be attending a republican rally instead is predictably infantile.

"If he needs to ask large questions, he ought to begin with how he conducts himself as a authorities minister.

"The Greens may have failed to deliver a deposit return scheme, but they can definitely recycle tedious anti-monarchy rants.

"As on so many points, the extremist Greens are out of contact with the vast majority of Scots who see the Coronation and the King’s dedication to Scotland as one thing to have fun."

Mr Harvie insisted he is "proud" to be speaking at the protest, rather than attending the service where Charles will be presented with the Honours of Scotland - the country's crown jewels.

He said: "There are many individuals in Scotland who regard the monarchy as a tiresome spectacle and a logo of values we do not maintain.

"I will be proud to speak at the Our Republic rally and to stand with others who want to build a more democratic society where power and wealth belongs to the people rather than being passed down as an inheritance.

"That is only one purpose why I help Scottish independence. It will give us the chance to ask the massive questions on how we're dominated and to construct a fairer and extra equal society."

Ms Slater added: "In twenty first century Scotland, the monarchy is nothing to have fun. It is an out-of-date and undemocratic establishment.

"How can we justify a system that allows one family to enjoy so much unearned wealth and privilege at a time when millions of people have so little?

"Scotland is usually a fashionable and democratic republic with an elected and accountable head of state.

"I want every child in Scotland to know they live in a genuine democracy and that they can achieve the highest office, regardless of which family they come from."

Scottish First Minister and SNP chief Humza Yousaf, an avowed republican, will attend the service.

It comes because the King and Queen are north of the border as a part of Holyrood Week.