Using QFE
There is one airport where our company has us using QFE, primarily, I suppose, because everyone else there is using it. Metric altitudes begin upon entering the FIR . A conversion table is used for this. Descending through the transition level, QFE is set in the altimeter. QFE comes from both the ATIS and the approach controller, so there is no derivation exercise from QNH. Conversion of feet to metres for each altitude assignment is continued until glideslope intercept. Using QFE has never been a problem. The conversion to metric becomes a well orchestrated exercise, each pilot doing their part.