Leaders of parts of the country demand increased self-determination and EU re-entry

"The era of Westminster is coming to an end", declare the leaders of the three provinces in a newly signed, "historic" agreement.

Scottish First Minister John Swinney (SNP), Wales Rhun ap Iorwerth (Plaid Cymru) and Northern Ireland First Minister Michelle O'Neill (Sinn Féin) signed the agreement in Cardiff on Monday. In the letter, they call for constitutional changes that lead to increased self-determination rights, reports Sky News. They also want back into the EU.

Great Britain is a centralized country where most of the power emanates from Westminster in London. The move from the three leaders comes after newly appointed Prime Minister Andy Burnham advocated decentralization of decision-making.

The SNP favors an independent Scotland, just as Plaid Cymru wants to see an independent Wales. Sinn Féin wants Northern Ireland to be reunited with the rest of Ireland.

This weekend, US President Donald Trump, during a visit to Ireland, claimed that it would be "fantastic" if the two parts of the green island were united.

- It will happen sooner or later, he said then.