Britain is braced for another burst of early summer warmth within days, forecasters say. These striking weather maps show temperatures are to climb to 26C across parts of southern and eastern England, with 14 counties poised for the hottest conditions. New ECMWF forecast charts show high pressure developing across much of the UK by June 15, delivering largely calm conditions and sunshine to many areas. Typically, the mercury rarely exceeds 20C in early June in the UK. However, high pressure