A training centre to teach police officers how to deal with crowds throwing missiles and petrol bombs is being officially opened on Tuesday.
The purpose-built centre has been built by South Yorkshire Police at Manvers in the Dearne Valley and is also used to train officers from other forces.
It includes a mock-up of a street scene and is also the base for firearms officers and search units.
The opening will be performed by police authority chairman Alan Hartley.
Officers have been using the purpose-built public order centre since 2002 but this will be the first time demonstrations of the training techniques used have been shown to the media.