All Regions Europe Met Office pollen warning for London as ‘very high’ levels to trigger hay fever sufferers for 3 days Pollen levels will remain very high in the capital this week My London – WeatherRead More About Author OTW Observer See author's posts Post navigation Previous Clouds Hover Over the Alaska PeninsulaNext Unusual Storm System forming in the Caribbean…. Related Stories Met Office red warning for extreme 38C heatwave extended – full list of places hit All Regions Europe Met Office red warning for extreme 38C heatwave extended – full list of places hit June 25, 2026 Mayor Sadiq Khan unveils 37 heatwave measures in first ever London ‘heat plan’ All Regions Europe Mayor Sadiq Khan unveils 37 heatwave measures in first ever London ‘heat plan’ June 25, 2026 The ‘hottest’ part of London where the heatwave feels ‘claustrophobic’ All Regions Europe The ‘hottest’ part of London where the heatwave feels ‘claustrophobic’ June 24, 2026