Inspector Bob Jacobs said: "I understand that Sara can be easily confused and her family are understandably concerned that she may come to some harm.
“I believe that it’s likely that Sara is still in the Beaminster area. She is reasonably fit for her age and she has been known to walk considerable distances.”
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The drivers union ASLEF will meet with Southern tomorrow for secret peace talks, ITV News Meridian can reveal.
Monday afternoon's forecast for the west of the region
Monday afternoon's forecast for the east of the region