Yes, the Eurotunnel Le Shuttle (the vehicle transport service) and the Eurostar (the passenger train) both operate through the Channel Tunnel, but their nighttime schedules are quite different. Le Shuttle, which carries cars, coaches, and trucks between Folkestone and Calais, operates 24 hours a day, 365 days a year. During the "overnight" hours (typically between midnight and 6:00 AM), the frequency is reduced to about one crossing per hour, compared to up to four per hour during peak day times. This 24/7 operation is vital for the "just-in-time" logistics industry that connects the UK to mainland Europe. In contrast, the Eurostar passenger service does not run at night; the final trains usually depart between 8:00 PM and 9:30 PM, and service does not resume until early the following morning. This "night gap" is used by Eurotunnel engineers to perform essential maintenance and safety inspections on the tracks and catenary systems. For travelers, this means if you are driving your own car, you can cross at 3:00 AM, but if you are traveling as a foot passenger on the high-speed train, you must plan for a daytime departure.