For those of you not in the know -- if a race is live on Channel 4 , you can get a refund on your horse if it finishes second .
You placed your bet on William Hill 's mobile betting app .
For those of you not in the know -- if a race is live on Channel 4 , you can get a refund on your horse if it finishes second , and you placed your bet on William Hill 's mobile betting app .