Northern rail staff are set to go on strike tomorrow - affecting train services across Derbyshire.
The Rail, Maritime and Transport union (RMT) said its members will walk out for 24 hours in a row over the future role of guards.
Click HERE to find out how services will be affected.
Mick Cash, RMT general secretary, said the industrial action was the result of Northern bosses failing to guarantee the future role of guards on trains.
A spokesman for Northern said: "As our modernisation proposals are still in the early stages, it is a shame the RMT has announced strike action.
"Our aim is to reach a constructive resolution and we urge the RMT to continue the talks we have already started."