I didn't see it but if the referee judged that Higgins had made the best possible attempt to play the green it was only 'a foul' (not 'a foul and a miss'), in which case (if the cue ball was still snookered) Hawkins could either take a 'free ball' (from the position that the balls came to rest) or require Higgins to play again (also from that position).
[Rule 12(f)]
If the referee judged that Higgins hadn't made his best effort to strike the green he would have declared 'a foul and a miss'. Under those circumstances, once he'd decided to make Higgins play again, Hawkins could choose whether to leave the balls as they'd ended up or to have them replaced as they were before.
[Rule 14(b)]