By Ryan Fahey An enormous500-mile-wide Arctic blast will careen through the UK in a matter of days after Brits were granted a brief respite from the freezing wintry conditions. The new charts from weather forecaster Metdesk show the enormous weather front sweeping in eastwards from the Atlantic and stretching across the majority of the British Isles before making landfall on Friday February 23. Some parts of Scotland are forecast to be hit with as much as 2cm of the white stuff per hour. As the front moves south, the band will smash through the north east, north Wales and stretching down to so…