Chanting slogans like “What do we want to do? Stay in the EU!” thousands marched through central London Saturday to protest the United Kingdom’s vote last month to exit the European Union. The protesters said the British Parliament should overrule Britons’ 52-48 percent vote in favor of leaving, which has been dubbed “Brexit.”

“We can prevent Brexit by refusing to accept the referendum as the final say and take our finger off the self-destruct button,” said rally organizer Kieran MacDermott, a King’s College graduate, according to Reuters.