William Hill handles dead heats by dividing the winnings among the participants involved in the tie. If a dead heat occurs in a race or event, the bookmaker will calculate the winning odds for each contestant as if they won and then split the payout accordingly. For example, if a bet on a horse that finishes in a dead heat for first place is successful, the stake is reduced by the number of competitors involved in the dead heat, and the winnings are adjusted based on the actual odds. This allows bettors to receive a fair return while accommodating the occurrence of ties in competitive events.