An a/c that routes from Farnborough to Northolt between 0909 and 0945, squawk E55P. It departs to the SW from Farnborough, does a 180 degree turn, passes to the W of LHR, turns NE towards Northolt, one orbit near Hayes, eventually routes to the north past Uxbridge and arrives into Northolt from the NE, landing to the SW.