In some ways the statement is correct, because even though the link between class and voting isn’t as strong as it used to be, there is still something between them. For example in the 2005 general election, the number of people who voted Conservative from the Classes A and B was 37 whereas Labour only had 28 and the Liberal Democrats had 29. Labour had the most voters in the classes C2 and DE. This shows that there is still a link between class and voting because the middle classes voted for Conservative which is what was expected while the working classes voted for Labour.
However, there are some people who would disagree with this statement. For example, they would say that in the 1980s, Ivor Crewe argued that the working class had been split in two. There was an ‘old working class’ which consisted of manual workers who belonged to trade unions. They live in the North and vote for Labour. A ‘new working class’ has also emerged who have better qualifications and work in the public sector in Southern England. Significant numbers voted for Conservatives in the 1980s.
This shows that not all the working class vote for Labour anymore, just as not all the middle class vote for the Conservatives.
Even when there was supposed to be class alignment not all the middle class voted for the Conservatives. There was a small minority group who voted for Labour, and overtime this has increased.
In conclusion, even though there us some evidence to suggest that there is still some class alignment, I think overall, social classes are slowly eroding away and people are starting to vote based on things other than class such as the media, age and where people live.