The SNP has made a complaint after one of its MPs was prevented from finishing his speech during a Commons debate.
Chief whip Mike Weir has written to deputy speaker, Lindsay Hoyle, after an exchange between Ian Blackford and former shadow Scottish secretary James Gray.
The pair locked horns on Monday during a debate on demands for a second EU referendum.
MPs were discussing a petition, signed by more than 4 million people, aimed at forcing another poll because Brexit was backed by fewer than 60% of voters on a turnout of less than 75%.
Ross, Skye and Lochaber MP Mr Blackford, who opened the debate, was repeatedly criticised by chairman Mr Gray for going off topic.
The Tory MP in an English constituency insisted the speech should stick to the question of a second referendum rather than Brexit’s wider issues.
And after numerous warnings, he was told to resume his seat.
An angry Mr Blackford declared: “I am making a speech which is legitimate in the context of this debate.
“The people in Scotland will see exactly what is happening here, which is the chair of this committee refusing (to let) the elected representatives of the people of Scotland give a speech.”
Mr Gray, who served as shadow Scottish secretary in 2005, but resigned after a matter of days, responded: “As a Scot, I very much hope that the Scots are indeed listening to the debate.”
Before being told to sit down, Mr Blackford had said Brexit “must not bypass Scotland”, and added: “Scotland voted to remain, we remain citizens of Europe, and this must be respected.”
He added afterwards: “SNP MPs will continue to stand up for the people of Scotland and speak up for their wishes at Westminster.”