Years ago this Carlton came my way...
Interestingly enough the bike sported a Raleigh head badge...
The following comments are based on what I have learned on-line. I have no hands on experience. That said, as i recall Raleigh bought out the Carlton brand/bike is the late sixties. Any remaining frame sets or bikes, regardless of the frame became badged with the Raleigh badge. Probably not too common these days.
I still have the Carlton/Raleigh tucked away and hope to find a new home for it, chromed head tube lugs and all...