Thanks for info and toast-related reminiscences. Looking at the patent MichaelG found (thanks Michael) it looks like the toaster I have is developed from the Copeman design, but not a direct copy. Looking at the box:

I thought 1950's, but wondered if the design of the toaster would have persisted for so long after the invention of the pop-up only a few years after Copeman's 1914 patent. However as people have memories of them from the 50's/60's they must have been around then. Maybe pop-ups were really expensive at that time.
Further research tells me that the Premier Electric Co. was active in the 1930's, but I haven't found the model I have – the 1930's ones were rather more ornate. Maybe post-war austerity?
My secret hope was that the producer of Money for Nothing might read this and arrange a meeting at the tip. It could easily be repurposed – a nice bit of fabric, splash of paint, a few resistors, and voila – a retro-chic heated hamster sofa. Worth 200 quid of anyone's money. Any other suggestions?
Robin
Edited By Robin Graham on 09/02/2019 23:51:06
Edited By Robin Graham on 10/02/2019 00:04:18
Edited By Robin Graham on 10/02/2019 00:04:47