BBC News Published image copyrightPress Eye Ltd/Shutterstock The UK has unveiled a new set of demands to redraw the post-Brexit trading arrangements it agreed with the EU for Northern Ireland. The government said border checks on goods from Great Britain it signed up to in the 2019 Brexit divorce deal had proved unsustainable. Brexit Minister Lord Frost said they risked harming business, and were damaging the "fabric" of the UK. The EU said it would not agree to renegotiate the terms of the 2019 deal. The checks are included in the Northern Ireland Protocol, a section of the Brexit deal designed to avoid border checks on the island of Ireland.