Scots must be given the choice between the monarchy or a republic if the country votes for independence in the future, a Green MSP has insisted.
Ross Greer told the Record that the Royal Family had "consistently used their power over our laws to protect their own privileges and lifestyle".
The SNP has insisted the Queen and her successors would remain head of state if Scots ever voted yes at a future referendum.
But the Greens want the option of a directly elected alternative to be considered.
It comes as hundreds of thousands of people gather in London to mark the 70th anniversary of the Queen taking the throne.
Greer said: "We believe an independent Scotland should become a republic - and that is one of the choices we will be able to make when we are independent.
"It's not about the Scottish Government's prospectus including a commitment to an independent Scotland becoming a republic.
"We accept those are two different questions and it's right those questions are put to the public in different ways.
"It may well be one that is addressed through developing our constitution - a citizens' assembly or some other participatory process."
Asked if another referendum would be required on the issue, Greer added: "You could do that or you could do it through a citizens' assembly process.
"It could just be a decision that parliament makes - but I think that is very unlikely and not the kind of process we would want to see.
"At the moment we don't have a fixed position."
Green MSPs including Greer left the Holyrood debating chamber on Wednesday as Nicola Sturgeon led a debate congratulating the Queen on the occasion of her Platinum Jubilee.
'Crass stunt'
The walk-out was criticised by several Conservative MSPs who claimed it was a "crass stunt".
A Green party spokesman later said: "We respect others hold different beliefs and have no wish to deprive them of their celebration.
"Our MSPs decided to absent themselves from the short debate on the Royal celebration and instead spend their time serving their constituents."
Greer insisted his colleagues bore the Queen "absolutely no ill will" and their opposition was to the monarchy as an institution.
He added: "The British Royal family have consistently used their power over our laws to protect their own privileges and lifestyle.
"Prince Charles’ estate was exempted from legislation which would have given his tenants the right to purchase their own homes, the police are banned from searching the Queen’s estates for stolen artefacts - and here in Scotland their estates are also exempted from climate legislation.
"These changes were made after parliaments had passed the laws, so there was no democratic scrutiny.
"That isn’t the neutral and non-political monarchy we’re always told the UK has."
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