For me many memories revived here with the old films. A child at the time, I had a great time with an all- band radio. Even today, I remember the stentorian tones of the announcer in London. A classic opening to music happened to coincide with the letter V. This was played first. I think it was from Beethoven's Fifth Symphony. Da Da Da Dum. (Churchill had flashed the V sign replete with his cigar.)
The voice intoned:
Ici Londres. This is the London and the European service of the BBC.
We were quite free to tune in to "Germany Calling" on the long wave. Another story however.
I should say that the symphony opening was construed as the letter V in morse code. dot dot dot dash.