Bets placed on selections declared a non-runner, will be voided and have their stake refunded.
Bets placed on Ante Post selections declared as a non-runner will be settled as losing bets (unless “Non-Runner No Bet” has been declared, after which non-runner bets will be refunded).
If you’ve placed an Accumulator and your bet(s) are not Ante Post, the line related to the non-runner will be void. The remaining selections in the Accumulator will still stand.
Bets placed on a horse that has been declared as being "under starting orders", and fails to leave the stalls, will not unfortunately be voided and will be declared a losing bet.