Information on update: Warning area expanded westwards over northern England, and text updated. The start time has been adjusted to constrain the main risk period to Saturday, whilst the end time extended to later in the evening. Areas of heavy rain with embedded thunderstorms will move northwestwards across a large swathe of central and eastern England through Friday night into Saturday. Rain will likely be torrential in places, bringing 20-30 mm in less than an hour, with 60-90 mm in 2-3 hours possible in a few places. Whilst more widespread heavy rain will gradually clear northwestwards during Saturday, additional scattered heavy showers and thunderstorms may develop in its wake during Saturday afternoon and early evening, before eventually decaying later. For further details see https://www.metoffice.gov.uk/weather/warnings-and-advice/uk-warnings