The south east, east Midlands,Yorkshire and Humberside, north west and Merseyside and the north east are still suffering from "high" air pollution levels, Defra has warned.
A fresh air mass arriving later today is expected to push the pollution eastwards over the North Sea.
Higher numbers of complaints about breathing difficulties are thought to have been brought on by record pollution levels in recent days.
Air pollution in the east of England reached the top of the scale as a 'perfect storm' of conditions blanketed parts of the country.
Our region is one of the worst-affected by "very high" levels of air pollution today, with much of the East stuck under a cloud of smog.