South Hertfordshire (UK Parliament constituency)

South Hertfordshire was a constituency in Hertfordshire which returned one Member of Parliament (MP) to the House of Commons of the Parliament of the United Kingdom. It was created for the February 1974 general election and abolished for the 1983 general election when it was mainly replaced by the new Hertsmere constituency.

South Hertfordshire
Former County constituency
for the House of Commons
South Hertfordshire in Hertfordshire, showing boundaries used from 1974-1983
1974 (1974)1983
Number of membersOne
Replaced byHertsmere, Watford and St Albans[1]
Created fromBarnet, Enfield West and St Albans


Statutory definition
  • The Urban District of Potters Bar,
  • the Rural District of Elstree,
  • in the Rural District of St Albans the parishes of Colney Heath, London Colney, and St Stephen, and
  • in the Rural District of Watford the parish of Aldenham.[2]
Components' immediate predecessor seats

The land of the Urban District of Potters Bar in local government administration-abolished Middlesex has been in Hertfordshire since the creation of Greater London in 1965. It now moved into this new seat from the abolished Enfield West seat. 

The Rural District of Elstree was in the abolished Barnet seat. 

The three St Albans district parishes came from the very long-lived St Albans seat and Aldenham came from South West Hertfordshire.

Components' immediate successors

Colney Heath was went back to St Albans seat and St Stephen transferred to the Watford seat. 

The rest formed most of the new County Constituency of Hertsmere.

Members of Parliament

Feb 1974 Cecil Parkinson Conservative
1983 constituency abolished: see Hertsmere

Election results

General election February 1974: South Hertfordshire
Party Candidate Votes % ±%
Conservative Cecil Parkinson 21,190 40.3
Labour Alf Dubs 18,104 34.4
Liberal John Henchley 13,356 25.4
Majority 3,086 5.9
Turnout 52,650 82.2
Conservative win (new seat)
General election October 1974: South Hertfordshire
Party Candidate Votes % ±%
Conservative Cecil Parkinson 21,018 42.7 +2.4
Labour Alf Dubs 18,790 38.2 +3.8
Liberal John Henchley 9,393 19.1 -6.3
Majority 2,228 4.5 -1.4
Turnout 49,201 76.1 -6.1
Conservative hold Swing -0.7
General election 1979: South Hertfordshire
Party Candidate Votes % ±%
Conservative Cecil Parkinson 27,857 54.1 +11.4
Labour NG Male 16,059 31.2 -7.0
Liberal Gerald Sattin 7,001 13.6 -5.5
National Front S Fenn 605 1.2 New
Majority 11,798 22.9 +18.4
Turnout 51,522 79.0 +2.9
Conservative hold Swing +9.2


  1. "'Hertfordshire South', Feb 1974 - May 1983". ElectionWeb Project. Cognitive Computing Limited. Retrieved 22 March 2016.
  2. "The Parliamentary Constituencies (England) Order 1970". Retrieved 2019-02-25.