I still have my Robin Hood Lenton Sports I got new in 1970. It used to look like the one in the CL listing but had a Wrights W3N saddle on it instead of that couch cushion. Huret Allvit chain movers, Atom hubs and freewheel, Nervar cottered crank, Rigida Super Chromix steel rims and WW Dunlop tires. The pedals may have been Lyotard. I don't recall having wing nuts on the hubs but it was 52 years ago. And you are correct, it's basically a 10 speed Raleigh Sport. That said, I did several 200, 300, 400, and 600K brevets on it before I discovered Miyatas.
In it's current livery and configuration.