I agree with Unworthy1 and suspect this is a Carlton Professional, as opposed to a Raleigh Professional, purely on the basis of the chromed head lugs. I've never seen a Raleigh Professional with chromed head lugs and the Carlton Professional was known to have them in 1970, so it probably also had them in 1971/1972. The few Carlton Competition that I've seen did not use a fastback stay arrangement.