HEATHROW DIRECTOR
I get your point but you're talking of an extreme event that might happen once every hundred years...
It will of course always be a judgement call when to close the runway. Someone reporting "a possible birdstrike" is not enough according to me. A warning to the crew on final and slowing down the following approaches to create a gap for an inspection should be enough. If the commander decides to go around he can do it but it should not be a mandatory action.