NEW : Eurotunnel cancels Saturday service due to weather-induced problems . NEW : A fourth train broke down Saturday after Eurostar tried to run about 2,000 trains from St. Pancras . Affected passengers offered refund , return tickets , cash . Eurostar recommends passengers change tickets for later date or seek refund .
NEW : Eurostar cancels all weekend service due to weather-induced problems . NEW : A sixth train broke down Saturday after Eurostar tried to run four trains from London . Affected passengers offered refund , return tickets , cash . Eurostar recommends passengers change tickets for later date or seek refund .