Do I get my money back if my horse is a non-runner in an accumulator?

Not exactly — the non-runner leg is removed from the accumulator, and your bet is recalculated on the remaining legs. A five-fold becomes a four-fold, a four-fold becomes a treble, and so on. You do not lose your entire stake, but you lose the multiplying effect of that leg. If all remaining legs win, you are paid at the reduced accumulator odds. If the non-runner was your only remaining leg, your full stake is returned.

Is NRNB the same as a void bet?

No. NRNB applies when your selected horse is declared a non-runner — the race still goes ahead, other bets settle normally, and only your bet on the withdrawn horse is voided. A void bet occurs when the entire race is abandoned or the market is cancelled for regulatory or technical reasons. The practical effect (stake returned) is similar, but the triggers are different, and understanding which applies prevents misplaced expectations.

Can I get NRNB on ante-post bets for the Grand National?

Yes, but only through specific bookmaker promotions — it is not a standard rule. Several major UK bookmakers, including bet365, Paddy Power, and Ladbrokes, typically run NRNB offers on Grand National ante-post markets in the weeks leading up to the race. However, these promotions have conditions: they may apply only within a certain date range, up to a maximum stake, and refunds may be issued as free bets rather than cash. Given that the Grand National regularly sees more than 50% of entries fail to make the final field, seeking out an NRNB offer before backing a horse ante-post is particularly important for this race.