London, England, United Kingdom Severe Weather Alertstar_ratehome

Information on update: Warning area expanded across more of the Midlands, SW England and eastern England, and text updated to mention winds. Outbreaks of rain will spread northeastwards during Thursday, becoming persistent and heavy at times, before clearing to the northeast through the evening and night. Accumulations of 20-30 mm are expected fairly widely, in some places falling in just a few hours, with the potential for 40-50 mm in a few isolated spots, this most likely across parts of southern England. Given the saturated ground, this may lead to some surface water flooding. 
Rain will also be accompanied by strengthening winds through the afternoon and evening, particularly across southern and southeast England where gusts around 50 mph may be possible along some exposed coasts.

For further details see https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings