can you help name a Bond Street fashion shop from 1975/6?

[Pinkcoke]

When my mother came to England for the first time, she worked as a seamstress on Bond Street. I am trying to find out what company it was for, as she can't remember. She thought it was a small (for bond street) brother and sister owned business. Making mostly crocheted and knitted garments, dresses and such, which were made on site. She remembers covering buttons in matching colour fabric for these dresses, and that the workroom was right at the back of the shop. We ruled out Mary Farrin (made in Malta) and Bill Gibb (too patterned), which are the two brands producing knitted garments around this time that I knew of.
If you can make any suggestions please do and I will check with her if it sparks any memories.
Somewhere, we have one example from this time that we have to find and look at the labels. It went through our dressing up box as kids though so I hope it still has the labels on

 

[poppysvintageclothing]

Hope you can locate that garment. I thought of Mary Farrin right away as well but that doesn't fit the bill here.

 

[sewingmachinegirl]

Melanie I wonder if you could try contacting the V&A , perhaps one of their fashion historians would be able to help?