Rail passengers have been warned over possible delays to services next week because of strike action by train staff.
Members of the Unite union will walk out between Sunday, July 27, and Thursday, July 31.
It means a number of services for Wellingborough, Kettering, Corby and Market Harborough will be amended or cancelled.
Operator East Midlands Trains (EMT) says the majority of services will run as planned on Sunday, but the Monday to Thursday timetable will have a number of alterations.
Some services which are running are also likely to have fewer carriages than usual.
In a statement posted on its website, EMT said: “We are sorry for the impact that Unite’s action may have on your journey.
“We have put forward a very reasonable and fair offer, which represents a 2.75 per cent pay increase to our engineering staff. We are therefore disappointed that Unite has chosen to take this action, clearly attempting to cause disruption for our customers.
“During the industrial action, we will be working hard to deliver the best service we can and will have extra staff on hand at a number of stations to assist passengers with their journeys.
“Customers with pre-booked tickets for travel between July 27 and July 31 can either claim a full refund on their ticket or travel as close as possible to their original booked service.”
David Fursdon, a member of Railfuture East Midlands Branch, said: “Some rail services may not be affected at all but I would advise passengers to check in advance.
“Do please plan well in advance to help your travel plans go as best they can during the industrial action.”
During the disruption, EMT says its tickets will be accepted on Stagecoach’s X1 and X4 services between Kettering and Corby.
For more information about which services will be disrupted, visit EMT’s website or call National Rail Enquiries on 08457 484950.