Eight workers at a residential home near Braintree in Essex have been suspended after secret cameras filmed alleged poor care of residents.
One member of staff seen apparently slapping a resident was dismissed.
Anglia Retirement Homes said it had launched an independent inquiry into allegations of mistreatment at the Old Deanery in Bocking, after it was filmed by an undercover BBC reporter.
'Elderly Care Exposed' will be broadcast tonight.
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Voting is taking place across the Anglia region in the biggest test of political opinion since the General Election in May 2015.
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There'll barely be a cloud in the sky today and it will feel warm in the sunshine as temperatures reach 19ºC. Frost-free tonight.