When Britains closed their French branch in 1923, the moulds marked Depose (Registered) were repatriated and used in the London factory. Some were still producing figures as late as the 1950s, according to Joe Wallis' fine book Soldiers of Greater Britain. In the case of your figures, the mould was also re-engraved over the continental copyright legend. It's an interesting variant.
To date the piece - no moustache on the Dragoon means at least late 1930s, and if he has white gloves he's pre1953. White gauntlets from 1953 on. The paint treatment on the horse changed in the 1950s from that handpainted scrabble to sprayed grey shading.
