Details Publication date11 April 2019 Files 11 APRIL 2019Letter from Michel Barnier, Commission’s Chief Negotiator, to Steve Barclay, Secretary of State for Exiting the European Union, 11 April 2019 11 APRIL 2019Response from Steve Barclay, Secretary of State for Exiting the European Union, to Michel Barnier, Commission’s Chief Negotiator, 11 April 2019 11 APRIL 2019Revised Agreement on the Withdrawal of the United Kingdom of Great Britain and Northern Ireland from the European Union and the European Atomic Energy Community