"As citizens across the country, we call on you to reject May's Brexit and any other bad Brexit deal, take the catastrophic threat of No Deal off the table, and extend Article 50 for a year, allowing a new public vote to break the deadlock. Britain's entire future is at stake -- let's take the time we need to get it right!"

If Theresa May requests a three month extension of Article 50 (or longer), then the European elections will take place while the UK is still an EU member.