<sod >Paddy Power said the veteran left-winger is now certain to win and it is paying out Â£100,000 in the âbiggest upset in political betting historyâ.< eod>< sod > Describing the MP for Islington Northâs success in the campaign as the âbiggest upset in political betting historyâ, Paddy Power is so certain that Corbyn will win that it is paying out Â£100,000, even though polling closes on 10 September.< eod>