the expression, "dog's breakfast" comes to mind when looking at the assortment of parts there. Looks like parts were changed out at a time or two or three into the 70's. I searched through the ClassicRendezvous bicycle makers for the British Isles and France, and didn't find anything conclusive. Knowing the diameter on the seat post and the bottom bracket threading might help to put us on the right track (or take us off the wrong track) with our primitive sleuthing. Alternatively, one could appeal to Hilary Stone or Norris Lockley, and they may just happen to know what you have off the top of their head.