
Don’t know any of the welsh roasters, I’ve only spent an afternoon in Cardiff a couple of years back, but I’d be surprised if there weren’t a Multitude of options :)
As slightly relative aside, last time I was in South Wales, for a trip in Brecon, we decided to dry out in a motel in Ystradgynlais. I watched the young man who asked if we wanted coffee with breakfast carefully shake some supermarket brand instant into a Cafetière, let it steep for 4 minutes, before carefully and slowly plunging it. Charming in memory, if not on the tongue :)