All Regions Europe London pollen bomb to trigger hayfever with red warning issued by Met Office London has a longer hayfever season than other parts of the UK My London – WeatherRead More About Author OTW Observer See author's posts Post navigation Previous The Chance of an Early Season Hurricane…Next BBC Weather confirms date for mini-heatwave in London 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