The British Prime Minister's meeting the president of the European Commission today to try to strike a deal over the Northern Ireland Protocol.
The leaders are due to hold talks to discuss what they've described as a "range of complex challenges".
Rishi Sunak will need backing from eurosceptics in his own party, as well as the DUP and other unionists.
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The UK Deputy Prime Minister Dominic Raab says he's hoping an agreement will be finalised very soon.