I struggled right from the start (I couldn't write get go) to identify the song that was playing when the nurses were packing for their trip to Scotland. Any advice would be welcome. Tunefind ignore the Christmas Specials and the list on the BBC website is incomplete.
Thanks to Vicki Williams, the Music Supervisor for Call the Midwife, I can now confirm that this song is Till The End Of The Day by The Kinks. Vicki also corrected the two last singers below.
These are the other songs from this episode.:
Sleigh Ride by The Ronettes
Hippy Hippy Shake by The Swinging Blue Jeans
Jingle Bell Rock by Brenda Lee
Merry Little Christmas by Doris Day
There are other tracks listed on the BBC website for Call the Midwife, but I must have missed them or they were not there.