Passengers travelling between Derby and Chesterfield/Matlock are advised of changes to services as Network Rail carries out track renewal and drainage work.
The line will be closed and rail replacement buses in operation on Saturday 29 and Sunday 30 March.
Network Rail teams will be renewing nearly 600 metres of rail, sleeper and ballast to bring smoother, more reliable journeys in the Belper area, and improving drainage at Clay Cross Tunnel by installing 120 metres of new pipe.
On Saturday 29 March, East Midlands Railway (EMR) will terminate some of its London St Pancras to Sheffield trains at Derby, with others diverting via Alfreton to Sheffield but not calling at Derby. For customers travelling north of Derby, rail replacement buses will also run between Derby and Chesterfield.
On the Sunday 30 March, EMR will operate one train an hour between St Pancras and Sheffield via Derby.
EMR will operate a rail replacement bus service between Derby and Matlock all weekend.
CrossCountry services north of Derby will be diverted with journey times extended by up to an hour. Services will not call at Chesterfield over the weekend.
Fewer services than usual will operate between Birmingham and Newcastle via Doncaster – customers can check their journeys on the CrossCountry website.
Dan Matthews, Network Rail operations director, said: “We’re sorry to passengers affected as we carry out this important upgrade work at Belper and Clay Cross Tunnel.
“The enhancements will result in improved track quality, bringing smoother and more reliable journeys for passengers, while also improving drainage in the tunnel.
“Please check all parts of your journey before travelling in this area over the weekend of 29 and 30 March.”
Image credit: Network Rail
