"At the election, Europe and Immigration will be low on peoples' reason for voting. It always is..."
It may always have been, Gromit, but I would not be sure that the same now applies. Certainly immigration (which many people link with Europe) is becoming increasingly of concern as numbers of migrants increase. This report provides some interesting findings:
https://www.ipsos-mori.com/Assets/Docs/Publications/sri-perceptions-and-reality-immigration-report-summary-2013.pdf
To save you ploughing through it all (and I have not) figure 2 shows that (a year ago) around 40% of respondents believed immigration to be the most important issue of concern. Figure 3 shows over 50% raising immigration as a major issue with their MP. Figure 5 shows that 80% saw it as a major issue in the UK (though only 30% saw it as a problem in their local area). Figure 8 shows that 70-80% of those seeking work see immigration as a bad thing for Britain.
Whether these people are right or wrong is not relevant. It is what they think that matters and what they think may have an considerable influence on the way they vote - even if they are wrong. The vast increase in in new arrivals (560,000 arrived to settle last year) is having a considerable effect on the importance people place on immigration and to assume that they have not bothered about it much in the past so they never will is a bit rash.