The poster said all I had to know. On September 15, 1990, there would be a celebration to remember on the River Thames. That of "Battle of Britain Day, 1990". This history buff did not plan my trip to coincide with the event, but I was in London, England, and would be around to attend the fireworks.
I stood among a large crowd on the river's south bank, metres upstream from Tower Bridge. The sky darkened, the vintage searchlights fired up, probing and irradiating a low cloud ceiling. All that was missing was the drone of unseen Heinkel, Dornier, and Junkers aircraft. The Blitz was terrible for London's denizens throughout the summer of 1940, so nobody was celebrating the act of war, but the repelling of invaders....German "Luftwaffe" bombers. (Since there had been no definitive and crippling blows to the Royal Air Force, necessary if Unternehmen Seelöwe [Operation Sea Lion], the invasion of England, was to have any chance of succeeding, Adolf Hitler lost interest and turned his attention to the east.)
Music blazed from sparking loudspeakers as fireworks of all colours and stripes rose streaking from a barge anchored to the sparkling waters before us. For many Brits here, this sight and sound must have been emotional. I too was feeling it: Composer Ron Goodwin's magnificent themes for the films Battle of Britain and 633 Squadron were the perfect accompaniment, and helped lift us all up high. (Aces High!)
That event was the 50th anniversary of the great battles fought in the skies over England. Now we're at 80.