Steve Willington is a Met Office chief forecaster. He said: “The high pressure has been a key feature of the UK’s weather forecast over the last few weeks, bringing above-average temperatures and extremely dry conditions for many.

“However, we will begin to see a modest change as a weak weather front pushes south across the UK on Saturday bringing some much-needed rain, albeit it light and mainly concentrated in the north and west. Behind the front a showery air mass will bring potentially heavy showers some of which may be thundery.”

Until the weekend conditions will remain fine and warm for many with some locations – especially in southern and southwestern parts – just remaining in heatwave thresholds, albeit temporarily.

Greg Wolverson is a Met Office deputy chief forecaster. He said: “Fresher conditions will prevail from Sunday onwards, but temperatures will remain around average for the time of year.”

During next week Atlantic dominated weather fronts will push in from the west bringing some rain, but in between there will be brighter spells, which in the July sunshine should elevate temperatures to the mid 20sC.

Greg Wolverson added: “Although there is a return to rain in the forecast, we have just come out of an exceptionally dry spell and the forecast rain is unlikely to be widespread or substantial. Many areas are likely to continue experiencing prevailing dry conditions for the foreseeable future, especially in southern England.”

With temperatures expected to remain high over several days, people are advised to take sensible precautions in the heat, including staying hydrated, avoiding prolonged exposure to the sun during the hottest part of the day, and checking on vulnerable friends, family and neighbours.

UV levels are expected to be high or very high across many parts of the UK throughout the week, and people heading outdoors should ensure they use appropriate sun protection.

Pollen levels are also expected to be high or very high in some areas.