[caldrail]

IT would be pretty realistic if we could use Q codes, QFE and QNH for more accurate altitude settings at airfields when taking off or landing.

I don't think they used Q codes back then - though the information was the same. A major point however, linked with the other thread about airfields, is that there's no guaranteed way of letting the pilot know this information. The radio might not be working with ventilation provided by enemy fire, or the aircraft might not be equipped with one.

My point is that pilots were flying visually - bad weather operation was in its infancy along with radar detection.

There is the story of a B-25 flying across New York State in 1945 (or was it the year before?). The pilot wanted to transit Manhattan in poor weather, and the ground controller (which shows some rudimentary air traffic control in america at least) told him that wasn't a good idea, the cloud base being too low for safe flight. The pilot was apparently in a hurry to arrive at his destination and ignored the controllers advice, colliding with the Empire State Building. Thankfully the casualty rate was low, and one woman survived a fall in one of the lifts from a coniderable height.