It was once so easy in UK - QFE with Tower and QNH with Approach....
Then came leaden-minded airlines with 'one-size-fits-all' solutions, so QNH was more normal for their simple-minded pilots who had to use the same SOPs at 500 ft agl and 5000 ft agl.
Then the 'airline mentality' infected the UK way of working as being the norm. 'Hours builders', thinking that's what real pilots did, were keen to ape their people-tube heroes.
But no-one really thought about the basics. Why use QFE in the UK? Because we can - there are NO high elevation airports, so setting QFE isn't that difficult. Whereas elsewhere, it is impossible. Try setting QFE at Kathmandu! In any case, airliners have radalts, so there's always a height reference available.
Poor old student learning to fly in the circuit is conveniently ignored. No UK airline can afford training, so they don't see this as a problem.
Military pilots, being naturally more capable than wet-behind-the-ears low hours airline co-pilots, can cope with world-wide differences in SOPs. Not a problem....
But ask a UK airline crew to fly an approach at a UK military aerodrome on QFE and they simply can't cope..... Mummy says fly QNH, so that's all they can do....