He is now at the Palace to visit the Queen. (Waiting) Live outside Buckingham Palace https://www.youtube.com/watch?v=y60wDzZt8yg
He is now the former PM. Theresa May is now the Prime Minister. She is still in Buckingham Palace.
https://twitter.com/search?q=theresa%20may&src=rela
https://www.gov.uk/government/organisations