The leaders of the regions will meet in Wales on Monday to discuss how they should move forward together to seek more autonomy, and not least to hold a referendum on independence.
The three parts are indeed different, Rhun ap Iorwerth, leader of the Welsh separatist party Plaid Cymru, told the BBC. But, he says, they also have a lot in common.
As a pursuit of a different attitude from the government, he says.
All three parts of the country are more pro-EU than England, and in all three there is political concern about Nigel Farage's far-right party Reform UK.
