Election debate: Key facts as Johnson, Corbyn, Swinson and Sturgeon prepare for BBC Question Time Leaders' Special

The BBC will host a Question Time Leaders’ Special tonight, with Boris Johnson, Jeremy Corbyn, Jo Swinson and Nicola Sturgeon facing audience questions.

Follow our live blog of tonight's debate here.

It is the first time in this campaign the Liberal Democrats and the SNP will be involved in a leaders' debate, and comes after Tuesday night’s clash between Mr Johnson and Mr Corbyn, which saw a majority of undecided voters more impressed by the Labour leader.

The party leaders are expected to face questions on Brexit, the NHS and the economy, all of which have dominated the election campaign thus far.

Here is everything you need to know about tonight’s event.

What time is the debate and how can I watch?

The two-hour programme will be broadcast on BBC1 from 7pm, with a live stream available on BBC iPlayer and BBC Sounds for UK-based viewers. It will also be streamed internationally on the BBC News website.

The BBC News Channel and BBC iPlayer will have more extensive coverage from 6.30pm to 10pm, featuring specialist correspondents and extra spin room analysis.

Who is taking part in the debate?

Tonight’s programme will feature the prime minister and Conservative leader Boris Johnson, the Labour leader Jeremy Corbyn, Liberal Democrat leader Jo Swinson and SNP leader Nicola Sturgeon.

There have already been Question Time specials which have seen Brexit Party leader Nigel Farage and Green Party co-leader Jonathan Bartley quizzed over their policies.

What format will the debate be?

The debate will be moderated by Fiona Bruce, and will be broadcast from Sheffield.

The four leaders will not face each other during tonight’s special. Instead, the show will resemble the format used in 2015 and 2017, in which each leader receives 30 minutes to be individually questioned by members of the audience.

What other election debates are planned?

A three-way debate between Mr Johnson, Mr Corbyn and Ms Swinson will be hosted by Sky on November 28.

The following day, the BBC will host a seven-way debate in Cardiff, between leaders or senior figures from the seven major UK political parties.

The full list of people taking part has yet to be confirmed.

The BBC will then host a “prime ministerial debate” between Mr Corbyn and Mr Johnson from Southampton on December 6, just days before voters head to the polls on December 12.