Beautiful, late 1960s Carlton. Original finish, and it appears the only components updated are the tires.
Milremo cranks, probably produced by Stronglight but stamped Milremo. TA chainrings.
Zeus dropouts and Campagnolo Record rear derailleur.
Late 1960s GB stem, with raised lip around the stem binder bolt. That was discontinued around 1969-1970, next version did not have the raised lip, or the red sticker GB handlebar binder bolt, or the red size sticker(90mm). The GB Tourmalet (map of England) handlebars are beautiful as well.