Yes, the United Kingdom is a full participating member of the Interrail community, and Brexit has not changed this status. In 2026, UK residents can still purchase an Interrail Global Pass to travel across 33 European countries, and residents of other European countries can use their pass to travel within the UK on National Rail services. If you have a Global Pass, your journey includes one "outbound" and one "inbound" trip within your home country, meaning you can use the pass to travel from your local UK station to London to catch the Eurostar. The Eurostar is part of the Interrail network, though it requires a compulsory seat reservation fee (typically around €30 for standard class) which should be booked well in advance. Within the UK, the pass covers almost all train operators, including Avanti West Coast, LNER, and GWR. For non-European residents, the equivalent pass is the Eurail Pass, which functions identically within the UK, offering an efficient way to see the British countryside and major cities like Edinburgh, Manchester, and Bath on a single rail ticket.