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

hi - can anyone advise on dating this frame? Not really desperate to know what make it is - although that would be good to know - I just like to know the age, so I can respray it and build it up with age-appropriate parts. Thanks in advance.

Early 50s Freddie Grubb - Holdsworth. I've got an early 48-49 frame in the same blue.