I haven't got a vertical short like yours Dave, I am never central enough and usually spend most of the time with the big lens on which doesn't get wide enough to get the champagne shot in its entirety but I must do that next year, just stick the 24-70 f2.8 L on and see what I can get of the wider formation shots.
I have a few of the same formation but from an angle and closer in so you don't see the shape that you have captured. I like yours a lot actually, that mono works great. Anyway, for what it's worth, below is one of that formation in colour - hasn't caught the red of the planes very well as they had a bit too much back lighting. The angle of the lighting has given the smoke a rather bright hue as well. I also should have run the sky through a noise filter as it is breaking up a touch. Oh well, I still quite like it.
See what you think.
Cheers,
Rob