Capt Airclues,
In answer to your question, there are no set procedures, it depends on the individual situation each time. In this case I think a couple of aircraft were broken off final approach, any others further out would have been sent towards the hold.
For departures, they would be held on the ground until the Tower & Radar controllers between them were happy that the aircraft was tracking away from the SID, and then judicious use of traffic information! Also depends on the weather of course, but hopefully on this occasion it was VFR.