Sorry to resurrect an old post but I've just bought a very similar Ernie Clements frame. I was searching for info and this popped up. Mine has the same lugs and decals. It has Reynolds 531 main tubes and forks. The Reynolds decals date it to 1982-89 but there isn't any frame number other identifying clues.
I had assumed it was a generic Taiwan frame but I'm wondering if it was made in Wales. Unfortunately my frames paint is beyond saving so it's at the powder coaters so I'll lose the decals.
I'm hoping someone on here can give me any more information. I can't post a pic of it yet because I've only just joined.