Just in case Sir Humphrey thinks this is dead ...
Reg Cap (ATC) said: "Subsequent inspection revealed no obvious damage to approach lights or Localiser aerial, but there was a single (wheel?) track in the grass beyond the end of the runway, lasting about 50m.
DC8 drivers - is it possible for the port wing to lift just enough for the outer rear wheel of the main bogie to skim along the ground, but not the inner wheel? It wasn't a vehicle track (only one tyre track, not 2)."
Sir H.'s people seem to favour vehicle tracks - plural - whereas the airport says 'rabbits' ! So, rabbits on motorbikes, perhaps ?
He might also like to know that Reg Cap's 'port wing lift' and associated aircraft yaw, at the end of the runway, generated a corresponding deviation in the NATS radar track.
ToTH