Incidentally, whilst reviewing the DHC-8 interception on Saturday, I noticed a Wideroe DHC-8 inbound Heathrow from Bergen - interesting curvy route down over Scotland and the west Midlands, followed by a couple of orbits between Woking and Farnborough, before joining the base leg for 27L. Not sure if the orbits were due to the shenanigans with the wayward aircraft or just because it wouldn't fit in with the usual holds at either Bovingdon or Epsom.