The UK is set to experience a surge of spring warmth, with temperatures expected to rise to 21°C in London and surrounding areas by April 25. Forecast data from WXCharts indicates that regions in southern England and the Midlands will enjoy this unseasonably warm weather, with nearby counties like Berkshire and Surrey also seeing highs around this temperature. Other areas, including Kent, Crawley, and Reading, are predicted to reach approximately 20°C. Conversely, northern Scotland will experience much cooler conditions, with temperatures lingering between 7°C and 9°C, although some regions like Dumfries and Galloway may reach 17°C. The Met Office has indicated that high pressure will dominate the weather pattern, leading to largely dry and sunny periods across the UK, though some showery rain may affect northern and western parts. Overall, while southern regions bask in warmth, the north will face a stark contrast in temperatures.