I'm living and learning here...
I found this on the English FA website, under Powers and Duties of referees:
"ADVANTAGE
allows play to continue when an offence occurs and the non-offending team will benefit from the advantage and penalises the offence if the anticipated advantage does not ensue at that time or within a few seconds"
So that ref last night was allowed to let play go on for "a few seconds ". I don't know how many seconds elapsed between him blowing up and the goal being clearly scored. But isn't that the whole point of the rugby law? It may seems to go on a bit long but that's because the ref is giving time to see if there really is an advantage, and if there isn't he can blow up, bring play back and the non-offending team gets its free kick or whatever.
That's gotta be fairer than what we saw last night. What if we'd missed that pen?
http://www.thefa.com/football-rules-...---the-referee