evidence: NOWHERE in Britain voted for Brexit as keenly as Boston. On June 23rd 77% of the Lincolnshire town’s eligible voters participated in the referendum, fully 76% of them voting to quit the EU. Why? One explanation is obvious. On the train from Grantham, rattling through the big-skied cabbage fields towards Boston, four young men swigging from beer cans joked about its reputation: "You are now entering Boston, one of the worse places in the country for immigration," said one in a silly voice, adding: "That’s what you would say if you were a tour guide, wouldn’t you?" The town has a higher proportion of EU incomers among its population than any other in Britain (13%), mostly Poles and Lithuanians who work on the surrounding vegetable farms. This article appeared in the Britain section of the print edition under the headline "Brexitland versus Londonia"