Old Folder to identify, please.

[Gastroped]

Mornin' Good Folk. Can anyone help me identify this wee velo that came my way the other day, please, purely out of curiosity? Having rummaged about on t'internet it appears to be a sixties generic frame, badged up in this instance with an "S" on the head tube. It's been well maintained and all works ok except for the need of a toggle chain for the hub.
Thanks in advance.
If my old Mum (91yo and missing her cycling days!) doesn't feel she can stay upright on two wheels any more then it will probably be up for sale...

 

[FrankCrank]

Bit of a conundrum that one. As suggested in your other post, possibly a BSA variant. The hexagonal nut on the non drive side of the crank also appears on the BSA Shopper. However, I would have expected it to have a BSA pattern chainwheel, but yours does not. I have BSA and Triumph shoppers, and they both have the same chainwheel.
Here's what I mean about the hex nut on my BSA

And the Triumph/BSA chainwheel

Sorry this doesn't solve your puzzle, perhaps another sleuth can chip in

 

[Schwinnsta]

So this bike folds with the chain to the inside? That is a bit unusual. No?

 

[EltonFrog]

So this bike folds with the chain to the inside? That is a bit unusual. No?

No.

 

[FrankCrank]

One clue might be the 'S' logo on the headtube. Raleigh acquired many British bike brands, among them Sun and Sunbeam.
I only know of one other brand that folds with the chain inside, Brompton, so maybe it's an early prototype.........................or maybe not