Help identifying Central Belt waterside location.

I know this is a long shot, but can anyone work out where this might be?

The picture is about 50 years old, the Blazer badges are Kildrum Primary in Cumbernauld, but I can’t remember anywhere in Cumbernauld that fits.

Anywhere in the central belt is in scope, the fact we had our blazers on argued for it being a week day, though I can’t think why we had on school blazers but not the rest o our school uniforms.

I’m the one on the right btw.