Indeed commentators such as Crewe, Dunleavy, Rose and McAllister argue that class-party linkages have declined, resulting in a process they call 'class dealignment'.
In other words, the authors argued that the declining fortunes of the Labour Party were not a result of class dealignment, but rather a result of the changing size of the respective classes.
If we are to draw conclusions from these figures, they seem to lend credence to the arguments for class dealignment. Equally if we examine nonclass sociological characteristics, no clear sociological attachment can singularly explain the 1997 election.
Evidence of class dealignment, the growing number of undecided voters measured in opinion polls, and the growth of tactical voting all point to weaker PI.