This is the moment SNP MPs stormed out of the House of Commons partway through PMQs in protest after their Westminster leader was kicked out of the chamber.
The SNP has described this as a "democratic outrage" and claimed that Scotland's voice is being silenced while UK Government ministers carried out a "power grab".
"Yet, last night, she pressed ahead with a power grab in direct opposition to Scotland's elected parliament".
When Blackford refused to accept this, Bercow repeatedly told him to resume his seat, before calling for the party's Westminster leader to leave.
"We are giving message to the government that we will take them on, we are not prepared to sit back and see powers taken from the Scottish parliament", he added.
However, May responded: "We do expect that the outcome of the whole Brexit is a significant increase in the decision making power of Holyrood".
"It is a power grab and MPs from Scotland were not even given the courtesy of debating it last night". That is a democratic outrage.
SNP Westminster leader kicked out of PMQs and MPs follow after he challenges Speaker
The unprecedented event brought PMQs to a temporary halt as Mr Bercow refused his demands.
The heated scenario occurred during lively talks about Brexit as Prime Minister Theresa May faced tough questioning from ministers over the EU Withdrawal Bill.
Speaking afterward, Blackford said: "I called for the House to sit in private - using parliament's own procedures to ensure Scotland's voice is heard on Brexit".
Blackford eventually left the House of Commons with all of his SNP colleagues in tow, in a show of solidarity, much to the amusement of heckling Tory MPs. My mixed sequence of advice is that is better for the vote to be conducted at the conclusion of questions to the prime minister...
Blackford was unhappy with the government's approach to the European Union withdrawal bill.
While Conservatives at Westminster say some of these must come to Parliament to allow for common frameworks to be established in areas such as agriculture and environmental regulations, ministers at Holyrood fear the powers of the Scottish Parliament could be restrained for up to seven years. "Not one single Scottish MP was able to speak in that debate", he added.
Scottish Secretary David Mundell hit out at the nationalists for "constitutional posturing", saying it was "quite clear that it was never going to be possible to get agreed amendments because quite simply the Scottish Government, the SNP, Nicola Sturgeon have a different view of the constitution from everybody else".
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