Reform MSPs have walked out of the Holyrood chamber in protest against a debate about Scottish independence.

The party's Scottish leader Malcolm Offord, who had tried to have the debate cancelled because it related to non-devolved matters, described it as an insult and a waste of time.

He then led his MSPs out of the chamber, to jeers from the rest of the parliament.

It came after First Minister John Swinney tabled a non-binding motion asserting Scotland's right to decide its constitutional future - which passed with support from Labour and the Greens.

Offord told MSPs: "This debate is an insult to the Scottish electorate who expect politicians to deal with serious issues in their communities."

Scottish Greens co-leader Ross Greer quipped that he hoped a nearby pub had extra staff on this afternoon, adding: "They may be busy."

Presiding Officer Kenneth Gibson described Reform's "antics" as "a gross discourtesy to all members of the chamber".

Earlier, Swinney told parliament that his motion was a "vital question to debate".