CPT, it was cooling towers at Hams Hall power station near Birmingham as I recall. I don't know whether Hams Hall is still there, but I could see steam clouds above a large power station somewhere near Birmingham while flying up to Edinburgh the other day - and I immediately thought of Alex!
I hope that the Breighton folk will be able to air G-AEXF and the Arrow Active (Alex owned and bailed out of the other Active early in his flying career) alongside Spitfires and the Lancaster at a few displays this summer as a tribute to a remarkable aviator.
I shall raise a pint tomorrow night.
Treadders