1983 To 1997
The results of the Third Periodical Review became effective for the 1983 general election.
The review defined 30 burgh constituencies and 42 county constituencies, with each electing one MP. Therefore Scotland had 72 parliamentary seats.
In 1975, Scottish counties and burghs had been abolished for local government purposes, under the Local Government (Scotland) Act 1973, and the Third Periodical Review took account of new local government boundaries, which defined two-tier regions and districts and unitary islands council areas. No new constituency straddled a regional boundary, and no islands council area was divided between two constituencies.
The boundary commission was required to designate each new constituency as either burgh or county but had no predetermined basis on which to do so. The commission took the view that each constituency with more than a token rural electorate would be a county constituency, and others, predominantly urban, would be burgh constituencies.
1983 boundaries were used also in the 1987 and 1992 general elections.
Read more about this topic: Parliamentary Constituencies In Scotland (Westminster)