A lane is closed in both directions on the M5 between junction 20 B3133 (Clevedon) and junction 21 A370 (Weston-Super-Mare).
Lane three (of three) is closed for barrier repairs following an earlier accident.
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The evening will stay cloudy with drizzle and fog in hilly areas.
There will be early evening sunshine with a few patches of rain later on.
The Avon fire service has moved its headquarters from Bristol to share Avon and Somerset Police's Portishead base.