Monday starts frosty, cold and foggy for many areas, but away from any mist patches, bright and cold. Best of any sun on Monday morning in the west, brighter breaks in the east. Cloud developing later in the day to damp it down to bright spells.
Where it's misty, it could take a while to clear. It might still be misty in places around 9am, but should have lifted by Monday afternoon. Temperatures slightly down on Sunday's values at 6-7c, 43-45f. Lower than this in any stubborn fog, 2-4c.