Letters: How Warren Mitchell lit up the BBC staff canteen

Giles Oakley writes: The staff canteen serving the BBC rehearsal rooms in Acton, west London, always afforded wonderful opportunities for producers like me to spot off-duty stars such as Sir John Gielgud or Twiggy, both of whose smiles could light up the whole room. But no one matched the impact made by Warren Mitchell one wintry day at Christmas time in the 1990s.

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