Most modern trains in the UK are equipped with plug sockets, but availability varies significantly depending on the age of the rolling stock and the train operating company (TOC). Major intercity operators like Avanti West Coast, LNER, and GWR usually provide at least one socket per pair of seats in Standard Class, often located under the armrest or beneath the seat. In First Class, dedicated sockets and USB ports are almost universal. However, on older commuter or regional trains—such as some Southern or Northern services—you may find that sockets are entirely absent or limited to specific "refurbished" carriages. By 2026, many newer fleets like the British Rail Class 800 "Azuma" have integrated both 3-pin UK sockets and USB-A or USB-C ports at every seat. It is always a good idea to check the "Train Facilities" section of the operator's website before traveling, and if you are on a long journey with an older train, bringing a fully charged power bank is a wise precaution as the onboard sockets can sometimes be deactivated for maintenance.