Eurostar said it was unable to run "any trains" from France because of a fire caused by demonstrators outside the tunnel in northern France.
This morning riot police were called after wildcat strikes by workers at a terminal run by My Ferry Link in northern France caused hundreds of migrants to attempt to make the crossing to the UK in the chaos. Workers also blocaded the Eurotunnel terminal with burning tyres and rubble.
The company said all today's services were cancelled today, and advised passengers not to travel to stations.
Eurostar said: "Following Eurotunnel’s decision to suspend all traffic through the Channel Tunnel, Eurostar services will not be able to run for the rest of today.