East Midlands Railway (EMR) are reintroducing services cut in December and January due to the Omicron coronavirus variant.
Staff shortages caused by the strain led to widespread cuts to timetables to reduce short-notice cancellations.
EMR has reintroduced 33 regional Sunday services on routes such as Crewe-Derby, Nottingham-Matlock and Lincoln-Newark Northgate.
Passengers had voiced their frustration when the services were cut. In particular, changes to the Nottingham-Matlock line led to many people complaining that it had cut easy access to the countryside when it was most needed.
