Northern has been running a reduced timetable programme since the January lockdown, but is now re-introducing services on some key routes to help customers.
Its services cover seven stations in Northumberland – including Alnmouth, Acklington, Widdrington and Morpeth.
Chris Jackson, regional director at Northern, said: “We have brought in as many additional services as possible, with the resource we have available, and have prioritised routes and times where there is the most significant demand.
“The timetables we will introduce on May 16 have been designed to provide as many services as possible, at the times our customers need them, without risking punctuality and reliability.
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“We want our customers to have confidence in the service we are offering and our plan will give those customers the stability they deserve.
“We need our customers to work with us and to think carefully about their journeys as we steadily return to a more normal timetable.”
Meanwhile, Northern continues to take additional steps to make the railway as safe as possible.
Extra cleaning is being carried out on trains and at stations, and the operator is asking its customers to travel during less busy times where possible.
In addition, face coverings are mandatory (aside from those who have specific exemptions) on all trains and at stations.
The timetables being introduced on May 16 can be viewed at www.northernrailway.co.uk/travel/timetables