@Walter Hinteler,
France and Germany are understood to be at loggerheads over both the length of the extension and the conditions that the EU should put on a delay to Brexit.
Merkel, is arguing that a short extension to 30 June is unlikely to provide enough time for the impasse in Westminster to be broken, and Berlin is seeking an extension until 31 December.
Germany believes that the biggest incentive for Conservative MPs to back the Brexit deal is the threat of holding European elections.
Macron, meanwhile, is understood to looking at a very short extension, possibly up until before the European elections, sources have said. There could be a further extension if the UK signs up to stringent conditions, Macron has said.