According to a poll conducted by the Taxpayer's Alliance, one in five of those surveyed would leave the UK because they are annoyed with the lack of tax cuts from the government. The Sunday Times article also writes that those surveyed are disillusioned with the political parties, and this has also come through during some of the research for the project.
But during our focus groups it was also clear that the story was less about leaving the UK to escape high tax (which is moderate compared to other countries in Europe). As Max Hastings argues in his piece in the Guardian, there has to be an attractive 'pull' factor that is specific to the destination.
Interesting questions do arise about political apathy and representation. Do people take up their right to vote for UK parties abroad? Do they even vote in local elections of their new country of residence? From our work, it appears that the answer is often 'no'. What more could/should be done to prevent 'an unacceptable further erosion of democracy and human rights' as Jeremy Millard puts it in his comment?