Brexit talks: EU chief questions feasibility of Johnson's time the UK’s future relationship with the EU after Brexit, Ursula von der Leyen has Once the UK leaves the EU on 31 January it will remain in deal covering all aspects of the current EU-UK relationship, from trade to internal security applied to goods being sold into the EU market be extending the implementation period. Both the EU and the UK committed to agreeing a A leaked EU document seen by the Guardian lays out According to the paper, EU diplomats representing the member states will on sector to continue to operate within the EU through a decision on the “adequacy” of UK will need to sign up to EU fiscal, environmental and social standards citizens travelling between the UK and the EU, and future British involvement in the EU