In 2026, Lumo generally continues to run its services during UK rail strikes, as its staff members are usually not part of the RMT or ASLEF unions involved in the major national disputes. However, the service can still be indirectly affected if the strike involves Network Rail signallers, which can ground all trains on the East Coast Main Line. During strike periods, Lumo trains are notoriously "extremely busy" because they are one of the few operators still moving. To manage this, Lumo often implements mandatory seat reservations and may not accept tickets from other cancelled operators (like LNER) during these windows to prevent overcrowding. If you plan to travel with Lumo on a strike day, you must book your seat well in advance and check their "Travel Alerts" page 24 hours before departure, as they may operate a "reduced" timetable based on the availability of essential signalling and station staff along their route from London to Edinburgh.