Panasonic announces their intent to move their European headquarters from London to Amsterdam, citing concern over Brexit.
The UK Supreme Court finishes hearing arguments on the lawfulness of Prime Minister Boris Johnson's prorogation of Parliament. The court states it expects to rule next week. It is jointly considering appeals against two rulings. One, made by the High Court in London under English law, ruled prorogation was an entirely political decision over which courts had no jurisdiction. The other, made by the Court of Session in Edinburgh under Scots law, ruled Johnson acted unlawfully and the prorogation was a nullity that must be reversed.
More than 600,000 people gather at Parliament Square in London as protesters from the People's Vote campaign call for a second Brexit referendum deal between the United Kingdom and the European Union.
After talks with Prime Minister of the United Kingdom Theresa May and Secretary of State for Exiting the European Union David Davis in London, E.U. chief negotiator Michel Barnier calls on the United Kingdom to make a choice on what sort of future relationship it wants with the European Union after Brexit.