Can you help to identify these frames, bikes or parts?

I own both Triomphe and Chorus models, and can't tell the difference. It's possible they were renamed at some point and could be the same part.

The (C) Record seatpost has a more slender clamp, IIRC (I've also owned this before). Much of a muchness really.

Cheers, that's what I thought from looking on Google images at each type but good to hear it from the horses mouth so to speak.