Theatr Clwyd, MoldMusical about populist politics in small-town Snowdonia makes up for its slow pace with sharp writing and lavish design Here is a celebration of Wales in all its glory. With a gust of wind, Seiriol Davies' musical welcomes us to Milky Peaks, a pebble-dashed market town in the heart of Snowdonia. Inhabited by an array of lovable eccentrics, it receives a nomination for best British town " a ploy of a…