LONDON — Post-Brexit trade talks with the European Union are finished unless there is a significant change of approach from the bloc, Downing Street said on Friday. From our point of view, the trade negotiations are finished. The EU has de facto put an end to them and it will only be worth talking to each other if there is a fundamental change in the EU's position, a spokesman for Prime Minister Boris Johnson said. In a video statement to leaders attending the European Council summit in Brussels earlier on Friday, Johnson said that the UK would be willing to embrace a no-deal exit at the end of the year unless the EU could offer Britain a Canada-