Tate seed walk ban leaves visitors unhappy

Visitors to Tate Modern have been banned from walking on more than 100 million porcelain "sunflower seeds" that an artist is exhibiting.

The seeds were created to fill the central London gallery's turbine hall but concern has been raised over "dust" being created.

The idea was that visitors would be able to walk and touch the porcelain seeds but some visitors are now unhappy that exhibition has been roped off.