The Labour leader has said the PM should suspend Conservative candidates accused of betting on the date of the next election.
Sir Keir Starmer said if they were Labour candidates they would be gone by now, and "out of the door".
A spokesperson for the Gambling Commission said: "Currently the Commission is investigating the possibility of offences concerning the date of the election.
This is an ongoing investigation, and the Commission cannot provide any further details at this time."
The BBC’s Marianna Spring has been using her Undercover Voters to analyse how the election is being fought on social media.
BBC Yorkshire Political Editor James Vincent asks voters if they will turn out to vote on 4 July.
The Lib Dem leader defends his party's tactics for getting its manifesto ideas across to the public.
John Curtice examines the latest opinion polls ahead of the 4 July general election.
Keir Starmer confirms he's prepared to make enemies to grow economy
Your Voice, Your Vote – The BBC answers your questions about tactical voting.
The PM says three times it would not be right for him to comment on the investigation into his former aide.
The Labour leader says he is revealing a "manifesto for change" and a plan for hope, growth and wealth creation.
Craig Williams is repeatedly asked if he had inside information when he placed a bet on the date of the general election.
The BBC's Henry Zeffman gives us his take on the parties' strategies following their manifesto launches.
The Conservative leader says he wants to build on his record and "continue the progress we have made".
Sir Keir says he campaigned under Jeremy Corbyn but did not think Labour would win the last election.
Nigel Farage appears to have had at least one object thrown at him while on the campaign trail in South Yorkshire.
In response, the prime minister says "we've been through a very difficult time as a country", but have "now turned a corner".
Labour leader Sir Keir Starmer has criticised the Conservatives' "Corbyn-style manifesto", saying "anything you want can go in, [but] none of it is costed".
The prime minister has said the Conservatives will aim to make housing easier if they win this year's election.
Watch: Sunak says Conservatives will cut tax if they win
The Lib Dem leader briefly escapes the twists and turns of politics on amusement park rides.
Ian Gribbin, the party's candidate in Bexhill and Battle, claimed the country would be "far better" if it had "taken Hitler up on his offer of neutrality".
The Labour leader promotes his party's plan to create more than 3,000 nurseries based in primary schools in England.
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