David Cameron will leave Downing Street for the final time as Prime Minister later, with Theresa may waiting to replace him.
Mr Cameron will face his last Prime Minister’s questions in the Commons, before heading to Buckingham Palace to tender his resignation to the Queen.
He told the Daily Telegraph: “As I leave today, I hope that people will see a stronger country.”
After taking office, Mrs May will set about naming her own frontbench team.
May was the only remaining candidate in the conservative leadership contest following Andrea Leadsom’s withdrawal on Monday.