No, not all UK trains have toilets, but the vast majority of long-distance and regional trains do. In 2026, the general rule is that "Intercity" trains (like those operated by Avanti West Coast, LNER, or GWR) and "CrossCountry" services are required to have accessible toilets in multiple carriages. However, on short-distance commuter or "Metro" style trains—such as many Merseyrail services, some London Overground routes, and various suburban lines around Manchester or Birmingham—toilets are often omitted to maximize standing room for peak-hour travel. These short-hop journeys typically last under 30 to 45 minutes, with the expectation that passengers will use the facilities at the station before or after travel. For travelers with disabilities, the "Passenger Assist" app in 2026 provides real-time data on whether a specific train scheduled for your route has an "accessible universal toilet." If you are planning a journey over an hour, you can almost always rely on there being a toilet on board, though it is a common "complaint" in the UK that these can occasionally be "out of order," especially on older rolling stock.