British actress Emma Thompson described dancing with the Prince of Wales as "better than sex".
She spoke to Time magazine, which had extensive access to Prince Charles and spoke to more than 50 of his friends and staff for a profile ahead of his 65th birthday next month.
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The world's first ever 'hole in the wall' was installed in Enfield, north London, on June 27 1967.
America says it has "identified preparations" for an attack similar to that which killed at least 86, including 30 children, in April.