I saw the events at Headingley yesterday and I have to say it was an amazing bit of sportsmanship by England and obviously the correct decision, BUT...
Considering that it was the other team's "fans" who caused the problems it really ought to have been them to concede. They should be dismissed from the tournament (Australia should win by default) and not be allowed to play again (at least in this country) until they learn to control their fans. That's what would happen if it were reversed... just my 2 pence.
Or possibly Alec Stewart had money on Pakistan to win in that over
