UK weather: Why this isn't a heatwave... yetTo play this video you need to enable JavaScript in your browser.This video can not be playedUK weather: Why this isn't a heatwave... yetClosePeople across the UK have been enjoying unusually warm weather, but when can we call it a heatwave?SubsectionUKPublished20 April 2018Shareclose panelShare pageCopy linkAbout sharingRead description