Liz Truss will become Britain's Prime Minister. What happens next?

Liz Truss has won the Conservative Party leadership contest, but she'll have to wait until Tuesday to formally become prime minister.

Truss and outgoing leader Boris Johnson will travel to Balmoral in Scotland tomorrow in order to meet with Queen Elizabeth II, as per Britain's unwritten constitution.

The Queen must formally approve the formation of a new government led by Truss. Normally, these meetings would take place quickly at Buckingham Palace, which is a short distance from 10 Downing Street, but the 96-year-old monarch will stay at her Scottish residence this time.

A royal source told CNN that decision was made to avoid last-minute alternative arrangements should the Queen experience any episodic mobility issues.

Once those formalities are finished, Truss will head back to London and arrive in Downing Street. She will announce her new Cabinet, which is likely to include many of her supporters during the contest.

Then, on Wednesday, Truss will face Prime Minister's Questions for the first time.