Nine months after Britain voted to leave the European Union, the Brexit process has finally begun.
Theresa May has formally notified the European Union of the triggering of Article 50, signing a letter which was delivered to European Council leader Donald Tusk by Britain's EU ambassador.
This means the two-year negotiation period with the EU is now underway, and the UK will have fully left the EU by March 2019, marking the end of a relationship which began in the 1970s.
Mrs May has also appeared before MPs for her weekly Prime Minister's Questions, stressing the need for unity among both politicians and the country at large.
She said: "It's my fierce determination to get the right deal for every single person in this country,
"We are one great union of people and nations with proud history and a bright future.
"Now the decision has been made to leave the EU, it's time to come together."