In exactly one month, the United Kingdom will be voting whether or not to remain a part of the European Union. To cut a long story short, this election has been called in response to support for and pressure from the United Kingdom Independence Party. Arguments for Britain leaving including it "taking back" its sovereignty and no longer having to pay the EU membership fee whereas arguments for staying including the UK being safer with a nearby cluster of nations and having the benefits of strong human and worker rights laws.
Opinion polling on the referendum is divided, as shown by swings back and forth this year. However, I expect that the United Kingdom will vote to remain part of the EU, much as Scotland voted to remain part of the UK back in 2014.