No that would fall as rain, please refer to the atmospheric conditions, we are talking -6 uppers in a strong wind from the east. The level of modification would bring rain even far inland, perhaps if the wrap round reaches the pennines above say 300m you'd see snow.
It's like how even inland with -8 uppers in a NWly we still barely scrape a wintry mixture, for this setup you'd need -9 uppers or below, and even then for costal areas it'd be too marginal.