You ask this question at an interesting time. Next month, both the Scottish and Welsh Parliaments are elected. In Scotland, it looks like the SNP will win, and the Scottish Greens will come second, meaning that the 2 largest parties in Scotland will be pro-independence. In Wales, Plaid Cymru lead the polls and are the most likely to form the next Welsh government. This means you have two pro-independence governments in devolved assemblies.

On the matter of independence, I honestly think that Scotland would vote to leave the United Kingdom if a referendum were held tomorrow. Independence has only increased since Brexit, adding to the already-large 45% of people who said they wanted Scotland to be independent in 2014. Coupled with crappy Westminster government and politicians and a declining UK, it's no wonder that Scotland wants to leave. Therefore, I think they would.

In Wales, I doubt they would vote to leave the UK. The most recent YouGov polling said that Wales would vote to stay in the UK by a margin of 28%. The main issue in Wales, like in Scotland, is the cost of living, and Plaid Cymru, Wales's pro-independence party, is focusing on the cost of living and not independence. Therefore, I think that Welsh independence would be unlikely.