Eurostar is expected to run a restricted service at least until the end of the month after the fire last week in a freight train in the Channel Tunnel.
The high speed train operator said that 12 services a day will run to Paris and seven a day to Brussels.
Normally there are 21 and 10 services a day respectively to the two cities.
Eurostar advised customers to travel only if their journey was ”absolutely essential.”
The train company said this particularly applied to travel at the weekends.
Four airlines, BA, bmi, Air France KLM and VLM have put on extra capacity or flights to cope with the train disruption.
The fire broke on a freight train about seven miles into the Tunnel from Calais last Thursday afternoon.
Eurostar stopped all trains on Friday but resumed severely reduced services over the weekend.
Eurostar advised travellers with essential journeys to arrive at their station and check-in as normal and they would be put on the first available train.
Passengers who decided not to travel will get a refund or be able to exchange their tickets for travel at a later date, the train company said.
BA said it had increased capacity on flights to Brussels and Paris over the weekend and used larger planes for the first two services to Paris on Monday.
VLM said it will run one extra return flight between Brussels and London City today (September 17), tomorrow and Friday.
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