1946 UTC Sounds like a slow somber version of the Lincolnshire Poacher music, followed by a possible ID...? Radio. Then English 5 digit numbers by a YL
1955 UTC YL with "End of message" followed by the musical IS on flute
1958 UTC ID by YL then "Control ?....back to 0", followed by more 5 digit numbers in English
2004 UTC "End of Message"