QFE or QNH
Spot heights and elevations on charts are given relative to msl and therefore QNH albeit that obstructions such as masts give both the height and msl elevations. When height is given with regard to obstructions it will bear little relation to the QFE datum of the point of departure - beware!
By flying away from the circuit it makes safety sense to fly on a datum that unambigously relates to the information on your map.
It should also be considered that earlier this year the UK officially gave up QFE and so the standard UK datum is QNH. Controllers are still required to give the QFE to those pilots that request it.
QNH then is a must for x/country flight but using QFE for landing i'm sure will remain for a long time.