clearance
AAIB: "At 2218 hrs, the pilot requested clearance
from ATC to re-enter the Glasgow Control Zone and
return to GCH; this was approved. No further radio
transmissions from the pilot were received."
Minor point. I would expect the pilot to repeat back the clearance so that would have been the last transmission rather than the initial request for clearance. So either it never happened or it was inferred in the narrative. Slightly ambiguous though.