First recorded by Ray Noble & His Orchestra (US #15 1940).
Other hit versions by Vera Lynn (1940), The Glenn Miller Orchestra (US #2 1940).
From the wiki: “‘A Nightingale Sang in Berkeley Square’ is a romantic British popular song written in 1939 with by Eric Maschwitz and Manning Sherwin, composed in the then-small French fishing village of Le Lavandou. The song had its first performance in the summer of 1939 in a local bar, where the melody was played on piano by Sherwin with the help of the resident saxophonist. Maschwitz sang the words while holding a glass of wine, but nobody seemed impressed.
“The song was published in 1940 when it was first performed in the London revue ‘New Faces’ by Judy Campbell. In the same year it was recorded by both Ray Noble (with vocalist Larry Stewart) and also by Vera Lynn (‘We’ll Meet Again’), the English singer and actress whose musical recordings and performances were enormously popular during World War II. Her version of ‘A Nightingale’ was released in the midst of the London Blitz.”
Vera Lynn, “A Nightingale Sang in Berkeley Square” (1940):
The Glenn Miller Orchestra, “A Nightingale Sang in Berkeley Square” (1940):