The Economist takes a look at the growing sentiment in the U.K. for bailing out of the EU. Their analysis is that the outcomes would be largely negative.
However, they believe if there were a referendum on the question today Britain would leave. One major question would be the status of guest workers from the EU working in the U.K., and vice versa. That question sounds familiar, as we grapple here with the question of the forward status of illegal aliens in the U.S.