A bomb alert in northern France brought Eurostar traffic to a standstill on Thursday morning, with trains blocked at Calais-Fréthun — the high-speed station on the French side of the Channel that most London-bound and Paris-bound services pass through.

The Pas-de-Calais prefecture announced the closure on X, warning that the situation was being assessed and that traffic in the surrounding area could be affected. Eurostar confirmed in a statement that, at the request of French authorities, trains were unable to pass through the station, causing delays on some routes to and from London. Several departures from St Pancras International were shown as delayed during the closure.

The disruption was short-lived. By late morning the prefect reported that the situation had been verified and services were gradually resuming, with trains running through the station again before midday.

For passengers caught up in it, the practical advice was straightforward: Eurostar told affected travellers to take the next available train if they missed an onward connection. Anyone holding flexible or semi-flexible tickets would typically be rebooked on a later service without penalty, though those with tight onward plans — car rentals, hotel check-ins, ferry crossings — bore the brunt of the delays.

The incident is part of a wider pattern. It follows a string of bomb threats and hoaxes reported on flights and at schools across Europe over the past week, including thousands of hoax alerts targeting schools in the UK and Italy. For travellers, the takeaway isn't panic but preparation: security alerts at major rail hubs and airports can close a line for hours with little warning, and rail operators — unlike airlines — often can't offer much beyond rebooking.

If you're travelling by Eurostar in the coming weeks, it's worth checking the live departure boards before heading to St Pancras, Gare du Nord or Brussels-Midi, following Eurostar and SNCF on social media for real-time updates, and building a buffer into any same-day connections. Keep booking references handy and know your ticket's flexibility terms before you travel. Disruptions like this one usually resolve within hours, but they can upend a carefully timed itinerary — so a little slack in the schedule goes a long way.

For now, it's business as usual on the line, with trains running to and from London as normal after the morning's alert was cleared.