How Parties have Adapted to Change – Cadre Party
How Parties Have Adapted to Change – The Mass Membership Party
How Parties Have Adapted to Change – The Catch-All Party
How Parties Have Adapted to Change – The Cartel Party
Theories of Party Systems -The Frozen Party System
Theories of Party Systems – The Downs Model
Theories of Party Systems – Satori
How do voters decide who to vote for
How do voters decide who to vote for – The Michigan Studies
How do voters decide who to vote for – Social Class
How do voters decide who to vote for – Partisan Dealignment
Electoral Geography of Great Britain
Electoral Geography of Great Britain – Conservatives
Electoral Geography of Great Britain – Labour
Electoral Geography of Great Britain – Liberals
Electoral Geography of Great Britain – Plaid Cymru
Electoral Geography of Great Britain – SNP
Electoral Geography in Great Britain – UKIP
Electoral Geography of Great Britain – Green Party
Electoral Geography of Great Britain – Respect
Electoral Geography of Great Britain – BNP
General Election Campaign – Choosing the Date
General Election Campaign – The Media
General Election Campaigns – Three types of Media
General Election Campaigns – Opinion Polls
General Election Campaigns – turn-out
Why did people vote the way they did – Social Class
Why did people vote the way they did – Housing Tenure
Why did people vote the way they did – Age
Why did people vote the way they did – Gender
Despite the work of the Electoral Commission overall biases appear in the system affecting the two main parties.
In 1951, Labour gained more votes overall but the Conservatives won a majority of seats because of their success in slightly smaller rural constituencies which they won with fairly small majorities. Since 1992 a bias has developed in favour of the Labour Party but this has been shaken by the rise of the Scottish Nationalist Party taking seats in Scottish strong-holds.
Although there is an overall bias, it is partly explained by the fact the turnout is lower in Labour urban seats and higher in Conservative outer suburban seats and the latter have larger electorates because it takes the Boundary Commission a few years to catch up with population changes.
In addition, there are a number of Liberal Democrat/Conservative marginals where Labour voters switch to the Liberal Democrats to try to defeat the Conservatives (Rob Johnston et al From Votes into Seats: The Operation of the British Electoral System since 1945, 2001 gives a full explanation).
To win the general election, though, one of the two main parties party has to be successful in the key marginals where they are both competitive.
This bias, and the hostility towards MPs in the wake of the expenses scandal, led the Conservatives to introduce legislation to reduce the number of MPs to 600 and require the Electoral Commission to make the constituencies of equal size.
This would still not have entirely removed the bias and the draft Electoral Commission draft boundaries produced constituencies which brought together areas with little connection and met with concern even from some Conservative and Liberal Democrat MPs.
During the Coalition Government 2010-15, The Liberal Democrats refused to support the change in retaliation for the failure of many Conservative MPs to support House of Lords reform and the legislation was withdrawn.