RateTheRef

Law 8 complicates matters. A penalty try can be awarded if foul play prevents a try being scored in a more advantageous position. Therefore WB would have had to satisfy himself that the scorer would not have picked the ball up and run behind the posts to ground the ball if he had not been fouled. My recollection here is hazy but on a kick and chase the attacker would just look to get a hand on the ball and ground it. A grey area imho.
Difference in 2 options was 2 points and a man advantage as a yellow card would have to be given.