What is the extent of electoral fraud at English elections?

The Attorney General Dominic Grieve MP has apologised for controversial remarks about corruption among ethnic minority groups in the UK. In the 2012 audit of UK democracy, Stuart Wilks-Heeg, Andrew Blick and Stephen Crone examined the extent of electoral fraud in English elections, finding that instances had fallen in recent years after a sharp increase in the mid-2000s, but vulnerabilities remained in our system of electoral administration.