Whilst I do not have the references to hand, I believe that the QFE is measured for the runway threshold. You could have different QFE values for different runways at the same aerodrome. Back in the day when I was fortunate enough to be taught by the Queen's finest we always did the altimeter check at the threshold.
Edited to add;
ICAO Doc 8896
Note.— When a QFE altimeter setting is provided, it corresponds to the aerodrome elevation except for:
a) non-precision approach runways, if the threshold is 2 m (6 ft) or more below the aerodrome elevation; and
b) precision approach runways;
in which cases, the QFE corresponds to the relevant runway threshold elevation.
I hope this helps you.
Last edited by Miles Magister; 11th May 2021 at 08:17.