Three months ago, voters in the United Kingdom decided to withdraw from the European Union. Now, some supporters of the planned withdrawal are calling loudly for a quick, sharp break with the EU. Last June, 52 percent of the voters agreed on a proposal for Britain to cancel its EU membership. That membership made Britain part of a political and economic alliance with 27 other countries. The voters’ decision to cancel or exit the membership is known as Brexit. The official process to leave the EU takes two years. It begins when the British government invokes Article 50 of a treaty. Britain’s new prime minister, Teresa May, has repeatedly said she plans to delay invoking Article 50. But “hard Brexit” supporters say the government should act quickly before the end of the year. Those supporters note that the British stock market is strong, and that numbers related to jobs and sales are high.