So that's what Ann's sister Charlotte was in.

Looking at my photo with a magnifying glass the tie had strips on it. Possibly three strips with larger gap between.

I had just spotted that the cap badge was lozenge or diamond shape not a rectangle.

Her coat could have been her own but you never know.

The buttons on the front of the caps, some have one, others two. Maybe a "rank" type thing but only amount of service etc.

Thanks again Norman Allan C