Some of Mrs May’s reasons for calling the election are particularly unacceptable. To say, as she did, that a poll is needed because “division at Westminster” is causing “damaging uncertainty and instability” sails troublingly close to being a Thames Valley version of the sort of thing that President Erdoğan might say in Turkey. Division in parliament is necessary and inherent, above all on something as momentous as the Brexit terms. Brexit reflects life-influencing divisions in the country. Mrs May’s decision and language illustrate the damage that referendums do to parliamentary democracy.