OK, I’ll try a different approach. With outstretched arms I pointed my left index finger at the port wingtip and my right index finger at the starboard wingtip of the Lancaster as it was overhead, at that point my index fingertips were 10″ apart, with my height being 6ft my fingertips were 8ft 4″ above the ground.
I think this paints a clearer picture but I’m not hopeful of anyone on here knowing of a calculation to get a height.