If this is the Ivy M Bladen born 1927 in Newport, Mon., then she would have been too young for service in most of WW2. As Ruskie observed service uniforms usually included ties, except for wear in hot climates ( India, Egypt ??).
The two collars do seem to have badges, but are they the same ?
I did wonder about Girl Guides, but they wore a broad tie, would any other girls' organization suit ?
Afterthought : Land Girls or similar ?