The Background colour indicates the party of the sitting MP at any given year.

Graph created with IGOR Pro v.5.04

Parties:

• Conservative = Conservative and Liberal Unionist (1918–1959); Conservative Party (1964–present).
• Labour = Labour Party
• Liberal = Liberal Party (1918–1979); SDP-Liberal Alliance (1983–1987); Liberal Democrats (1992–present).

Statistics gathered from:

• http://www.psr.keele.ac.uk/area/uk/edates.htm archive copy at the Wayback Machine
• http://news.bbc.co.uk/hi/english/static/vote2001/results_constituencies/constituencies/514.stm
• http://news.bbc.co.uk/1/shared/vote2005/html/514.stm
• F. W. S. Craig, British Parliamentary Election Results 1918 - 1949
• F. W. S. Craig, British Parliamentary Election Results 1950 - 1970

Data used:

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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. Subject to disclaimers.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue

• 2005-11-28 03:44 JeremyA 945×520× (23662 bytes) extend back to 1918, add background colours
• 2005-11-05 23:14 JeremyA 945×520× (20768 bytes) Extend back to 1931
• 2005-10-10 03:50 JeremyA 591×338× (10772 bytes) Add 1950 result
• 2005-09-05 20:01 JeremyA 589×337× (9789 bytes) Update party colours to better reflect those used elsewhere on wikipedia
• 2005-08-21 19:08 JeremyA 589×337× (9767 bytes) new upload {{GFDL}}