Can you help me identify this old London school uniform?

[MeantToStopAtTwo]

I’m looking at a pic of a primary-aged brother and sister from, I believe, sometime in the 60s. They lived in Marylebone and the girl later went on to Frances Holland, Regent’s Park if that’s any help.

They’re both wearing light grey coats.

The girl has a matching grey boater with a darkish blue ribbon around it and is wearing a blue scarf with some white stripes on it.

The boy has some sort of hat (maybe a cap?) in the darkish blue colour.

Anyone?

St Christina’s ?

Thanks for responding.

I was thinking it must have been St. Christina’s too when I remembered that their mother was Jewish and therefore unlikely to have chosen a Catholic school.

I’m starting to conclude it must be a school which no longer exists as, having looked at all the obvious options, nothing seems to fit.

I did wonder if it could be Garden House but it would have to have changed quite a bit.