Wales is the country that has most firmly maintained its language in Celtic villages, but the demands for self-government here have historically been more temperate than in one Scotland. However, Brexit has brought many citizens closer to the demands of nationalists and according to The Guardian the first independence demonstration in Wales history has been on Saturday: "Participants at the rally said Brexit and austerity have increased the trend towards UK exit from the EU. (...) Some Protestants stated that they have long been in favor of independence, but others acknowledged that Brexit and austerity have made them change." The concentration ended with the song of the Wales hymn "Hen Wlad Fy Nhadau".

Adam Price, leader of the Abertzale training Plaid Cimry, told reporters: "For years, our desire to have an independent Wales has been seen as a distant thing. But times are changing, demonstrations are on the rise and more voices are being heard in favour of independence. For decades, Westminster [Parliament of London] has forgotten us and that has increased poverty and lack of investment. One in three of our children lives below a level of poverty and just look at the chaos that Brexit has brought to realize that Westminster is not able to govern and replace Wales."

The demonstration on Saturday was organised by the new association All Under One Banner Cymru, which under the same name has promoted numerous mass demonstrations in Scotland.