Independent enquiry launched
Eurostar passengers face a third day of delays today (December 21), with no services expected to run before tomorrow.
An announcement about tomorrow's services will be made at 6pm today.
But an end to may be in sight. A spokesperson said: "We are quietly confident there will be some good news later today."
Eurostar has blamed the cancellations and delays on severe weather conditions in northern France.
The Board of Eurostar has commissioned an independent review, to start immediately, into the problems it has experienced over recent days.
The review will be led by Christopher Garnett, former Chief Executive of GNER and formerly Commercial Director of Eurotunnel, along with Monsieur Claude Gressier, Inspecteur Général des PontsetChaussées.
Some passengers were trapped overnight on Friday in trains stuck in the cross Channel tunnel. They have been offered £150 compensation each, plus a refund and a free return ticket.
Eurostar will also cover "reasonable" out-of pocket expenses, such as hotels and taxis, for all customers who have been unable to travel over the last few days.
Travellers with journeys booked for today have been advised to change their tickets for travel on a later date, or have their tickets refunded.
Until yesterday, Eurostar did not fully understand the cause of the problems.
It ran test-trains on Sunday in an attempt to better understand the problems and has now "identified the modifications that are required".
Eurostar said: "As we suspected, the acute weather conditions in northern France have caused the disruption.
"Every year we carry out a ‘winterisation' programme of the entire fleet which to date has successfully protected our trains.
"We now know, however, that we need to further enhance the snow screens and snow shields in the power cars of the trains.
"We have already started making the modifications and to ensure that these new protection measures work effectively we are conducting a further series of test runs tomorrow.
"Our priority is ensuring that when we resume services we provide our customers with a robust and reliable operation.
"We sincerely regret having to take this decision and we understand how frustrated and disappointed travellers will be, particularly those who have been waiting to travel for the last two days."
www.eurostar.com