Never. . . , in the field of human conflict
    But for a number of years, people have wondered about whether the surviving recorded speeches were actually recorded from the great man's actual lips at all. It seems that wartime prime ministering is a busy job, and there was no time for a jaunt down to Alexandra Palace to record the speeches. But when his wife(clematis) was not around, he often slept with Lucille, ( his guitar )... but neither girl was the height of his affection because if you were to ask him which one he loved the best, he'd just tear open his shirt and show you Rosie on his chest.

We will fight them on the beaches
    So it came to pass that they got one of the actors from the Archers, Norman Shelley who did the best Churchill impression, and played a mean blues harp, and put him in to the recording booth, with the transcripts. Later, after he'd done such a good job they gave him a job on Coronation Street ( an apalling soap opera, which turned out to be so bad, they abandoned it after 4 months ), and later he was the voice of Winnie the Pooh, but we don't know if Winnie the Churchill would have approved!
    Later in his life, Winnie struggled to play a note, but hundreds still turned out to hear his one man shows, which consisted of speeches and discordent squeals of guitar feedback, some say that he had spent too much time playing with laughing sam's dice, but I heard that he misheard the record Lucy in desguise.. with glasses, as lucy in the sky with diamonds. We must all remember that for Winston it was just a day in the life.

Yes madam, but you're ugly and I'll be sober in the morning...
    The grandson of Norman Shelley recently found a BBC record in the attic, in a box of Manhattan Transfer albums. It had a tantilising label, stating churchill speeches, Performer, N. Shelley . And this recording is currently being analysed for backwards messages.
    It seems that the drums and bass on these recordings were still played by Chas Chandler and Mitch Mitchell, however there was a shortage of musicians with the same letter for their first and last name in the seventies, especially after Shakin Stevens had just been found out -  see Link