It seems like today's disturbances in Calais have now spilled over to affect the Eurostar services.
I'm on the 12.58 from St Pancras to Brussels and we have been stopped in the tunnel as there are "people on the line".
Reports suggest protesters, most likely striking French workers, have been blocking the tracks and burning tyres on or near the tracks. Colleagues on the other side report smoke close to the tunnel entrance.
Announcements on the train suggest we'll be heading back to Ashford as police try to clear the tracks.