Greta Ann used to sing at the Marquee Club in London, she made a record on the Pye label, Sadness Hides the Sun.. 

The B side features "The Children's Song"  

You can have a listen here..   https://www.youtube.com/watch?v=n_Umog6Uz_E

 This is the B side..              https://youtu.be/huZ9-oGAzXU 

Greta also used to pop down to the Cavern in her lunchtime, see if you can spot her on this clip..! 

   http://youtu.be/DGE8Bl5q3EM