After repeatedly intoning "Scotland will not be disrespected by this Parliament," Bercow ordered the SNP's London leader to depart the chamber.
Wow! @IanBlackfordMP ordered from the Chamber — surreal scenes as the Speaker struggles to restore order and the SNP MPs walk out— Mark D'Arcy (@DArcyTiP) June 13, 2018
In response, Blackford called for the House to sit in private, in order to disrupt proceedings. If successful, his demand would've disrupted parliament for 15 minutes — the call was a mechanism for forcing a vote on clearing the private gallery.
I don’t think Bercow and the rest of the house understands how appalling it looks to many Scottish viewers that they continue to laugh uproariously at feeble jokes as the entire SNP cohort walks out. It serves to confirm the SNP line that Scots interests are treated with disdain.— Murray Foote (@murrayf00te) June 13, 2018
The leader's protest stemmed from Scotland's treatment in the Brexit negotiations, and the EU withdrawal bill in particular.
Bercow said he would take it at the end of the parliamentary session, and told Blackford to resume his seat. Blackford refused, so he was ordered to leave — when he departed, his fellow parliamentarians left with him.