POLICE cars, fire engines, ambulances and a helicopter are set to descend on a part of Huddersfield - but it won't be for real.
Emergency crews will be taking part in a dramatic mock-rescue operation to test their skills.
It all takes place at cliffs off Lindley Moor Road, near Outlane Cricket Club, next Tuesday.
The Yorkshire Air Ambulance will be flying to the scene to join the exercise.
Ropes will be fixed to bring a casualty down from the cliff face.
Huddersfield firefighter Mark Hurd said the aim was to get the casualty to hospital within an hour.
Police and paramedics will join the operation, along with firefighters from Huddersfield, Slaithwaite, Brighouse Elland, Halifax and Pontefract.
Mr Hurd said: "The rope cable way that will be used is the safest way to move casualties without further injuring them.
"The mock casualty will be placed on a stretcher, secured and sent on the cable way to ambulance crews."
Police will close off nearby side roads when the operation starts at 11.15pm.
Up to six fire engines, command support units and an incident support unit will be in use.
Mr Hurd said it was an important opportunity to try an unfamiliar procedure and for agencies to work together.
He said: "It is a challenge to work with other agencies.
The intention is to get things running smoothly and to know exactly who is doing what.
"It also helps familiarise us with the equipment."