Met Office Chief Meteorologist, Frank Saunders, said: “High pressure in combination with warm, southerly winds will bring a spell of summery weather across parts of the UK early this week, with plenty of sunshine and higher than average temperatures for most.
“On Monday and Tuesday temperatures in Northern Ireland and Scotland will be in the high-teens to low 20s Celsius but with cloudier skies at times, and the odd shower. Meanwhile England and Wales will be sunnier, especially today with temperatures widely above 25 Celsius.  It’ll turn hot in southern and eastern areas with temperatures reaching around 30 Celsius in a few spots, possibly 31 Celsius on Tuesday.
Frank continued: “On Wednesday a cold front will slowly sink southwards, bringing cloudier skies and temperatures closer to average for northern parts of the UK, but southern areas will still see plenty of sunshine and temperatures in the mid- possibly high-20s Celsius, which could meet heatwave criteria in a few locations.”