I always thought they had to blow for full time/half time when the ball was in a neutral position, or in a position where theres no chance either side could score immediately.
Was surprised the full time whistle was blown last night just after Ronaldo's last free kick had been saved, I would have guessed they would have played on until it had been cleared.
And our freekick in the last few seconds of the everton game. Players in the box, just hit the freekick and the ref blowed.