the couple , who married a decade ago at the windsor guildhall , are spending their anniversary privately at birkhall in deeside .
birkhall , which sits on the queen 's balmoral estate , was the venue for their first anniversary celebrations .
the new image , which is the work of top photographer oliver dann , was taken in the run-up to last month 's visit to the u.s but was released by clarence house today .
since then , the duchess of cornwall as she is now known , has become an integral part of the royal family - and would be cheerfully accepted as charles ' queen by 50 per cent of britons that