Clinging to the QFE Altimeter setting is so....well Wellington like. Then add in all this Transition Height, Regional QNH, and the like. You folks should simply join the real World and go to a single Altimeter setting using QNH below the one Altitude such as the US FAA does.
It makes sense.
It makes things far more simpler and SAFER.
But then whenever did KISS hold sway with the CAA or RAF?