A limited service is running through the Channel Tunnel following a blaze that halted travel for three days.
A spokeswoman for the operator said the first car shuttle left Calais in France on Sunday at 7am.
Travellers between Britain and the Continent have faced chaos since last Thursday's fire in the tunnel under the English Channel seabed.
The north tunnel remains shut while authorities investigate the blaze. The south tunnel was unaffected and has now reopened, allowing limited Eurostar and rail freight services to start.
Efforts are being made to open the two non-damaged sections of the north tunnel "within days", according to a spokeswoman.
A Eurotunnel statement said: "Our passenger service will be severely disrupted on Sunday 14, Monday 15 and Tuesday 16 September.
"There will be a limited service available with only one departure expected every two hours between 6am and 8pm.
"To avoid severe disruptions to your journey, we therefore strongly recommend that you make alternative travel arrangements.
"Should you decide to maintain your booking with us, please expect a disruptive service and extended delays."
Meanwhile, Eurostar warned passengers that train services through the Channel Tunnel would operate on a "very restricted timetable" for at least the next week.
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