Nigel Farage said his Brexit Party won't contest seats held by Boris Johnson's Conservatives in order to prevent a hung or pro-Remain parliament.
The SNP, which has run Scotland’s government since 2007, promised a bill to stop the NHS being a "bargaining chip" in post-Brexit trade talks.
The pact, which does not include the largest opposition party, Labour, is expected to hold for some 60 of the 650 seats up for grabs in the House of Commons.
Political parties are still in the process of writing their election manifestos - but here are the pledges made so far.
Watson had long been a thorn in the side for the Labour left.
There has been a surge in registration among voters aged under 25 since Boris Johnson announced Britain would be holding a snap general election on December 12.
Britons will go to the polls in a snap election on December 12.
The UK general election in December shouldn’t just be about Brexit. It should be about how we cushion the effects of Brexit, if and when we leave - and even if we don’t.
An intelligence report which security experts and politicians say should be published, will not be released until after the December general election.
A quarter of British MPs not seeking re-selection have complained of a toxic atmosphere in parliament and politics.
Farage told the BBC he chose instead to campaign countrywide against Prime Minister Boris Johnson's EU divorce deal.
The Brexit Party currently has no seats in the UK Parliament. Will that change come December?
UK election 2019: Where does each party stand on Brexit?
The US President told Nigel Farage in a radio interview that Corbyn would be "so bad" and take the UK "into such bad places".
This election is very different from those that came before - because for many voters, it will be something of a second referendum on the Brexit issue.
Britain's main opposition Labour party officially kicked off its election campaign on Thursday.