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

I live near Slough, and IIRC Dave built wheels for Stowes (Windsor) so I can swing by and see if there's anyone there who's still in contact with his son, or knows much about the business/customers.
Hope this helps.

Spoke to the guys at Stows, apparently all the documentation that went with the frames was binned when the business was sold on by his children after his death about 4 years ago so no records remain.
The vast majority of his frames were made from Reynolds tube sets, and from the late 70's onwards it was mostly 753. Prior to that he built in 531c. That said, he did build a few frames in Columbus.
If you're planning to refinish the frame, the decal sets offered by Lloyd of Penrith are of excellent quality.