Michel Barnier: Brexit extension could bring 'uncertainty' for UK

EU chief negotiator Michel Barnier has said EU leaders will have to assess “the reason and the usefulness” of any request by Theresa May to extend the Article 50 withdrawal process.

The European Union will need to know “the reason and the usefulness” of any UK request for a delay to Brexit before deciding whether to grant an extension, the EU’s chief negotiator has cautioned.