It was due to a signalling fault in Manchester earlier today.
There's been disruption to rail services heading into North Derbyshire this morning.
A signalling fault at Trafford Park in Manchester around an hour ago had temporarily affected East Midlands Trains heading into our county.
#EMTUpdate There is a fault with the signalling system at Trafford Park has now been fixed and services are now starting to move through the area. Some residual delay may occur due to congestion whist services return to their normal schedule. pic.twitter.com/Yq0wiCTQgG— East Midlands Trains (@EMTrains) July 30, 2019