Britain is voting in a general election today. During his re-election campaign, Prime Minister Boris Johnson hitched his re-election campaign to a promise to “get Brexit done” — while selling bankers and blue-collar workers two very different visions for the country. Some hope his promise will mean restoring the United Kingdom to its past glory. But what does it actually mean? Guest: Mark Landler, London bureau chief of The New York Times. For more information on today’s episode, visit nytimes.com/thedaily.  Background reading:There is growing anxiety among some voters that the prime minister’s vow to complete Brexit could undermine the country’s national health service, a key social safety net. The service is at the center of an election scandal in the final days of the campaign.As Britain prepared for the election, a Times reporter spent two weeks driving from London to Glasgow. He found a country united only by its disunity.With agitations for secession in Scotland and Northern Ireland, our chief correspondent asks: Could completing Brexit spell the end of the United Kingdom as we know it?