Speaker is Forced to Break Brexit Deadlock - Brexit Explained

The video discusses a rare voting event in the House of Commons where the votes were tied, requiring the Speaker to cast a deciding vote. This situation, not seen since 1993, involved Hilary Benn's amendment. The Speaker, John Bercow, followed the constitutional convention of not creating a majority where none existed, voting against the motion. The video explains the historical context and rules governing such decisions, emphasizing the importance of majority support for significant decisions.

When was the last time the Speaker had to exercise a casting vote before this event?

What principle does the Speaker follow when exercising the casting vote?