In March the Electoral Commission fined the Conservatives £70,000 as a result of a Channel 4 News probe into election spending. Here Daily Mirror investigations editor Nick Sommerlad writes about his paper’s role in revealing allegations of Tory Party election fraud at the 2015 general election. While Channel 4 News was first to the story of election overspending – breaking it in February 2016 – it was the Mirror which first revealed thousands spent on a national bus tour which was not declared locally

This is billed as the Brexit election – the opportunity to refight the battles of a year ago over the biggest political question in a generation.

But it could yet turn into an election fraud election – with a cunning plan hatched by David Cameron’s Remainer CCHQ more than two years ago coming back to haunt Theresa May and her merry band of Brexiteers.