UK weather: Exact date maps turn purple in surprise cold blast before 29C scorcher returns
![UK weather: Exact date maps turn purple in surprise cold blast before 29C scorcher returns](https://i2-prod.mirror.co.uk/incoming/article33165117.ece/ALTERNATES/s615/0_Weather.jpg)
The UK is set for a cold blast where temperatures could be down to single figures and 8C lower than normal for the time of the year before a 29C heatwave arrives