Firefighters tackle a blaze on Wanstead Flats, east London, on one of the warmest days ever in the UK.<br /><br />Footage filmed today (July 27) shows firefighters battling the grass fire just north of Bush Road, Leytonstone.<br /><br />Temperatures are expected to reach an all-time high of 37 degrees Celsius before thunderstorms cool much of the country off.
