Glasgow isonthe samelatitude as Moscowbutbecauseitis close to thewarmAtlantic Oceanshoresandlies in the path of aprevailing westerly wind, ithasa significantly more moderate climate.
Usually, the prevailing south-westerly wind would take the ash cloud away from Europe and over the polar region, but a high-pressure area is bringing it over Europe, where it is sitting and barely moving as the ash spreads.