Could anyone tell me what car these handles are from?

I'm clearing out my grandpa's workshop and have come across these classic car handles but am struggling to identify them. We are in the UK, so it's unlikely to be a US car.

According to chatgpt (ha!) they're from the Rootes Group and the key code FJA14 fits Rootes usage more consistently than Austin but I don't trust that and can't find a match as all the handles I'm looking at aren't symmetrical like these.

Does anyone here know?

Thanks!