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Story summary
- A spell of unusually warm weather is forecast across the UK this week, with temperatures reaching 20°C in Wales and western England on Wednesday.
- The warmth is driven by east to south-easterly winds and high pressure, creating a Foehn effect.
- England will have sunny skies, with mild nights expected.
- Scotland and Northern Ireland remain cloudy and rainy.
- The warmth continues into Thursday and then cools to seasonal averages by Friday.
