This is the cheat code of the cancelled-train world. When a train is cancelled, many operators let you use your ticket on any train, even a different company’s. At a staff member or check the station’s information board—it’s often posted there.
Imagine your ticket is a golden ticket from Willy Wonka. It usually works on the next train, the slower one, or even a bus. Always ask politely: “Is there ticket acceptance on other services?” The answer is often a lovely “Yes.”