LONDON—France threatened to reject British Prime Minister Theresa May’s request for a three-month delay to Brexit on March 20 unless she can guarantee to get her departure plans through parliament, potentially sending Britain crashing out of the EU without a deal.
May asked the European Union to allow Britain to extend Brexit to June 30 and EU leaders are expected to discuss the matter at a summit on March 21. The decision must be taken unanimously by all remaining 27 EU members.
