These are the details from the flight plan recovered from the wreck of Dornier Do217-E2 "U5 KP" from 6/KG3 which crashed near Castle Howard.
This flight plan shows a flight in a westerly direction to a point just to the NE of York.
The map of the flight plan casts doubt on the RDF description of aircraft flying in a 'northerly direction' and that 'small groups turned inland between Filey and the North Yorkshire Moors and headed for York'.
It is possible that the flight plans for the other aircraft taking part were different and followed the described action of flying north and turning towards York at different times.
All the detailed Luftwaffe records for operations in Europe in 1942 were destroyed so it is impossible to confirm what actually happened.