I think you're being a bit harsh on them. By no means do I mean this is happening immediately, but movements are movements. What has begun now won't stop unless serious reorganisation of the current contradictions causing this movement occurs. I do not see the British bourgeoisie taking that action because they simply have no reason to, Wales doesn't hold any value to them.

This movement will grow and it will eventually blossom into a majority for independence as has occurred with Scotland now. It will take several years but you can basically call this right now, there is zero incentive for them to resolve the social conditions causing the movement to grow therefore grow it shall.