Cooler on sunday and getting colder still as we go into the new week. now, high pressure will eventually give way, we think, as we go deeper through the week, but then the big question mark about how quickly these weather systems from the atlantic — or, indeed, if they will at all — move in and provide a change to more unsettled weather in time for christmas. so, colderfor a time next week, more widespread overnight frost, but if you're looking at your app and the forecast online, yes, it may look as if it turns unsettled just before christmas, but there's still a lot to play for in the de...