I did this but have been stiffed. Buried in the t+c is this: "Offer valid to bets struck from 8am BST on the day of the nominated game until kick-off and does not apply to in-play bets." I put the bet on yesterday. I hate these rules designed to trap you. They were quite happy it advertise it yesterday when it wasn't in fact valid.
I did this and they still haven't given me my money back. Twats.