22c forecast for south east is 11c warmer than average - and would beat 2015 high of 20.7 c in aberdeenshire .
among the best coastal areas for warm weather tomorrow will be hunstanton in norfolk and whitstable in kent .
weather will stay mostly dry and sunny for next few days , but some showers are expected from late tomorrow .
defra warns asthma sufferers and people with lung problems of ` very high ' air pollution in south east tomorrow .