Leon Blackman, spokesperson for Oddschecker, compares with two diagrams of election prediction on 2024, left, and election result on 2019, in London, Wednesday, July 3, 2024. Britain's general election is a big event for political gamblers. Betting on Thursday's election is expected to generate tens of millions of pounds in bets though the biggest event is a bit of a snooze. (AP Photo/Kin Cheung)