The UK is set to swelter in a two week heatwave forecast to send temperatures soaring up to 30C.1portA blast of hot air from the south will nudge the mercury high above the average for August – possibly topping the record for the year so far. The mercury reached 33.5C in July at Brize Norton, and the Met Office expects temperatures in the low thirties near London on Monday and Tuesday.

Met Office forecaster Alex Burkill said: “Temperatures are likely to climb. At the moment they are a little bit below average for the time of year because of the north-western flows.  As we go through the week it will come more from the south-west, by the end of the week, and then towards the beginning part of next week we will then be drawing air from the south, and so on Monday and Tuesday we are quite likely to see temperatures getting into the low thirties.”

Northern England is likely to see temperatures in the high twenties, with the hottest conditions further south around London.

Bookmakers Coral is odds-on at 1/4 that temperatures will reach 30C or higher before the end of this week, and are offering 2/1 odds that the record high temperature of 38.5C will be broken in the UK this summer. John Hill, a spokesman for Coral, said: “If the forecasts are correct, we have a two-week heatwave to look forward to this month.”