In the House of Commons all who agree shout "Aye", all who disagree say "No" and all who don't have an opinion are quiet. The Speaker decides which side was louder (so, for example, if the "Ayes" were heard more loudly, the Ayes would win). If both shouts are equal, then a division is called in which both side (Government and Opposition parties) go to a divisional corridor (either the corridor which agree - the one on the right - or the one which disagrees - the one on the left). During a division, anyone who wishes to abstain doesn't go into a corridor but instead remains in the chamber.