UK weather: Parts of Britain face 20-day heatwave as dry spell stretches beyond a monthWarm, settled weather is set to continue across much of the UK this week, with sunshine dominating and temperatures climbing to around 29C. Although a few showers are possible in northern areas, significant rainfall will remain in short supply for most. High pressure keeps the UK warm and dryThe prolonged spell of hot and dry weather is being driven by a large and stubborn area of high pressure anchored just to the west of the UK. A few showers may also develop across northwest Scotland, while elsewhere conditions will remain dry into the evening. Friday will bring similar conditions, with sunshine and dry weather continuing for most.