New British Prime Minister Boris Johnson will face a series of challenges in his first 100 days in office, culminating in the Brexit deadline on 31 October.
Here are some of the key events:
24 July
Theresa May will take her final session of Prime Minister's Questions before offering her resignation to the Queen. Mr Johnson will then take over as prime minister.
25 July
The final sitting day in the Commons before it breaks for the summer recess.
1 August
Brecon and Radnorshire by-election: Tory candidate Chris Davies is seeking to regain the seat he was ousted from by a recall petition triggered in the wake of his conviction for submitting false expenses claims.
If he fails, Mr Johnson's working majority in the Commons will be cut to just three.
24 August
G7 Summit in Biarritz: Boris Johnson's first appearance at a major global summit.
Donald Trump will be among the world leaders at the gathering, potentially providing the opportunity for a meeting with the controversial US President in an effort to highlight the importance of the special relationship and a future trade deal.
17 September
The UN General Assembly meeting in New York will provide another opportunity for Mr Johnson to appear on the global stage and set out their vision for the country's place in the world.
29 September to 2 October
Conservative Party Conference: The gathering in Manchester will be a key test of the new Tory leader's ability to unite the party and provides a platform to use their closing speech to address the nation.
31 October
The deadline for reaching a Brexit deal: Unless there is a further extension, this will be the UK's last day as a member of the European Union and it will leave, with or without an agreement.
