Eurostar has accepted all aspects of the independent review into the severe delays in December.
The review revealed a severe lack of crew training in areas such as stress management, as well as serious engineering flaws and a need to improve evacuation plans.
Richard Brown, Eurostar's CEO, said: "We welcome the review. We have accepted all of its recommendations and we've committed ourselves to implementing them as soon as we possibly can.
"I recognise that we let down a considerable number of our passengers very badly with the disruption and breakdowns before Christmas, and, once again, I'd like to say, on behalf of Eurostar, I am very, very sorry for the disruption."
Eurostar has dedicated £30m to implementing changes, which will include the extra training.
Eurostar will also be working with Eurotunnel to invest in additional rescue locomotives to have on standby, and a state-of-the-art communications system to ensure train crews can better communicate with passengers and Eurostar operations.
The review, led by Christopher Garnett, former chief executive of GNER and former commercial director of Eurotunnel, along with Claude Gressier, board member of French Railways (SNCF), concluded Eurostar needs to improve its operations in three main areas: train reliability, evacuation and rescue, and communication.
A total of five trains were trapped in the channel tunnel. One particular train entered the tunnel at around 22.30 on the evening of December 18, but passengers did not reach their destination until 09.15 the following morning.
The report said it was claimed by passengers on one of the affected trains that the crew were "generally unhelpful and appeared intimidated by passengers", and "appeared to go into hiding".
Garnett said: "We recommend a lot more training for train crews, especially in evacuation measures and dealing with passengers."
One of the recommendations was for train managers to be given special stress training, similar to that given to airline crews.
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