Yes! If you have a Interrail Global Pass, you can travel on the Eurostar high-speed train connecting London with France, Belgium, and the Netherlands. A seat reservation is mandatory for this train and can be made up to 6 months in advance.

Traveling from London to Paris via the Eurostar is technically included in the Interrail and Eurail Global Pass, but it is not "free." Because Eurostar is a high-speed international service with limited capacity, pass holders are required to purchase a mandatory seat reservation. In 2026, these passholder fares typically cost €35 for Standard class and €40 for Standard Premier (if you hold a 1st Class pass). These seats can sell out weeks in advance, particularly on the popular London–Paris and London–Amsterdam routes, so it is vital to book your reservation as early as possible. While you still need to use a "travel day" on your pass, the passholder fare remains significantly cheaper than the standard dynamic pricing of a last-minute Eurostar ticket, which can often exceed €200.