Excl: Here's what happens if you scrape Betfair data for bets on a July election.

This graph cuts off at the end of 21 May, the day before Sunak announced the election.

There's a flood of bets that day - before Rishi formally told the cabinet and stood in Downing Street. pic.twitter.com/AfKyzAbDBQ

— Jim Waterson (@jimwaterson) June 20, 2024