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Blickling Hall's stained glass window given clean

25 April 2012 Last updated at 12:32 BST

Work has begun on cleaning panels of stained glass at the National Trust's Blickling Hall in Norfolk as part of the final stage of a restoration project.

The 12 panels, most of which were made in Germany, date back to the 16th and 17th centuries and are regarded as historically important.