The ‘March for a People’s Vote’ is heading from Pall Mall to Parliament Square in central London to demand a public vote on any final Brexit deal. The event is being held on the second anniversary of the referendum of June 23, 2016, when around 52 percent of those who voted opted to leave the EU, with Article 50 of the Lisbon Treaty being invoked as a result. The article triggered the formal mechanism for the United Kingdom to leave the European Union.