Kevin Whately
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Kevin Whately speaks about his mother's dementia

25 January 2011 Last updated at 07:32 GMT

Kevin Whately became an ambassador for the Alzheimer's Society after his mother, Mary, was diagnosed with dementia.

The star of Auf Wiedersehen Pet, Inspector Morse and Lewis spoke to the BBC series Cause Celeb about his sadness at seeing his mother deteriorate and his hopes for progress in the care of the illness.