Theresa Villiers wants Northern Ireland out of the EU. That stance may be untenable

Theresa Villiers, the Northern Ireland Secretary, is campaigning to leave the EU – a step that would have profound ramifications for the region. A formal land border between Northern Ireland and Eire would have to be reintroduced, trade would be affected and the EU funding that has helped the region recover from the Troubles would end. Nicholas Wright argues that, as the campaign goes on, Villiers’ position may become untenable