Due to coronavirus, a number of key elections were delayed from May 2020 by a year and will take place on Thursday, May 6 alongside other elections already planned for that day.
Among the prizes being contested are the composition of the next Scottish parliament, 13 local mayor races including London and the West Midlands, and the composition of Senedd Cymru in Wales.
Results will start to roll in on Friday and the BBC's flagship coverage will be co-hosted by Edwards and Wark from London and Edinburgh, with Reeta Chakrabarti providing regular updates from the counts.
BBC One Scotland and BBC One Wales will have their own tailored coverage, while S4C will also be broadcasting special coverage in the Welsh language.
"The BBC's aim is to give our audiences all the information they need before heading to the polls," said Katy Searle, the BBC's executive editor of politics coverage.
"Through our extensive range of programming, across digital, online, TV and radio, we will deliver widespread news, analysis and scrutiny of each political party.
"A key part of our coverage will be audience led as we interact and engage with voters up and down the UK, hearing their opinions and views ahead of these important elections.
"We will provide the best service possible to all voters, delivering clear and informative programming ahead of casting their vote."
Additionally, in the run-up to the elections, leaders debates will be broadcast in the English regions, Scotland and Wales. body check tags ::