Nick Timothy resigned in the wake of the disastrous showing by the Conservatives in the election.
General Elections of the past were very different from this year's poll. Here's our selection of the best images from elections past.
The Conservative peer warns that a shift in public mood on Brexit could leave the party “holding the baby”.
Prime Minister called a surprise election to get a mandate for Brexit.
Accusations of racism, anti-Semitism and sexism have been made by both Labour and the Conservatives.
The Prime Minister will acknowledge that the loss of her Commons majority means she has to adopt a different approach to government.
Environment Secretary Michael Gove urged the PM and Chancellor to listen to independent bodies that review public sector pay,
The Government’s move was announced by Chancellor Philip Hammond in the Commons.
The Labour proposal was defeated by 323 votes to 309, majority 14.
Theresa May’s minority Government survived its first test of the new Parliament by defeating a Labour amendment to the Queen’s Speech.
The First Minister announced a “reset” of the timetable set out for another referendum.
The DUP has guaranteed its MPs will vote with the Government on the Queen’s Speech, Budget, and legislation relating to Brexit and national security.
The Conservative former minister says the “no deal is better than a bad deal” slogan should be dropped.
The shadow chancellor said the centre ground of politics had shifted.
However, senior minister Damian Green insisted that there was still “every possibility” of agreement.
The development comes just a day ahead of the Queen’s Speech.
If elected, the 74-year-old would be the party’s oldest ever leader.
A polling firm found that turnout among young people was up on the 2015 election, matching the EU referendum.
The PM was quizzed about ongoing pressure over her leadership following a poor election and criticism of her response to the Grenfell Tower disaster.
The former business minister has announced she will fight for the deputy leadership instead.
Ms Sturgeon said independence was a factor after her party lost 21 seats in the General Election, and vowed to “reflect on the result”.
Jeremy Corbyn confirmed Ms Abbott had been reappointed after she was briefly replaced after falling ill during the final days of the election campaign.
Commons leader Andrea Leadsom said Mrs May had the backing of her party.
The Liberal Democrat leader announced he was stepping down on Wednesday.