Older Londoners - What was this school?

[IbizaToTheNorfolkBroads]

I grew up in central London in the 80s. I'm trying to remember the name of a school near us, for no reason other than my old, addled mind can't remember its name and DSis and I were talking about school recently.

It was a state secondary school, sort of behind Sloane Square going towards S Ken.
Coed. Possibly only girls. The girls wore kilts and royal blue jumpers and dark green blazers (I think they were green, possibly navy). I loved that uniform (my liberal, lefty school didn't have one). They used Sloane Square tube.

Was it St Thomas More? Website now suggests that St TM does not wear kilts, but I'm stuck in the 80s.

Queens Gate? In South Ken, girls only, and navy uniforms.

Yes St Thomas More I’d say! Behind Peter Jones? I think the girls wore green blazers and the boys wore black ones. I’m not sure about kilts tho.

Yes!
Behind PJ
Boys and girls wearing different coloured blazers makes sense.

We were revisiting the old chestnut of DM regretting not sending us to a Catholic school.

Not a state school though. Very much not a state school!