fanfree,
Tinstaafl is correct. QNH advised by a ground station (human or automated) compensates for not only pressure variation from standard, but temperature error at ground level. Although called QNH, this is actually QFF.
Both QFF and QFE will indicate correctly when the aircraft is on the ground (Elevation or Zero respectively), and temperature error when above the ground station will be IDENTICAL when either are used. QFE offers no advantages here.
Seasons Greetings,
Old Smokey