This Evening and Tonight: There is a chance of scattered heavy, thundery showers in some places during the evening and overnight, becoming confined to the north by dawn. Clear spells will follow to the south, along with perhaps some patchy mist. Minimum temperature 10 deg C (50 deg F).
Sunday: Heavy showers will quickly clear north leaving a mostly sunny morning. Cloud and patchy rain, some heavy, will spread east through the afternoon clearing in the evening. Warm and humid. Maximum temperature 23 deg C (73 deg F).
Outlook for Monday to Wednesday: Mainly dry and fine on Monday. Cloudy with outbreaks of rain Tuesday. Breezy with scattered showers and sunny spells Wednesday. Lower temperatures, although still generally a little above average.
Here's a video report for the east of the ITV Anglia region:
And here's one for the west of the region: