As well as the clarification email to affected passengers, a Ryanair press release explaining to customers how and when they will be re-accommodated on other Ryanair flights or other airline flights will be displayed on the home page of Ryanair's website from today.
Ryanair must offer them a refund or the option of re-routing, including one with another airline, and tell them how to make a claim for expenses.
"There are clear laws in place, which are meant to assist passengers in the event of a cancellation, helping minimize both the frustration and inconvenience caused by circumstances completely out of their control", CAA Chief Executive Andrew Hainess said on Thursday.
Haines went on to point out that some customers affected by the first round of cancellations may have already accepted alternative flights or refunds, "based on misleading information provided by the airline about what was available to them".
Ryanair shares fell sharply yesterday after the crisis-hit airline was told "action, not words" was needed.
Wilson said that while customers were bearing the brunt of this cancelled flights fiasco, investors are just as anxious about rising labour costs affecting Ryanair's low cost model.
PA Wire PA Images A flight information display with Ryanair flights coded'FR at London Stansted Airport
Ryanair, Europe's largest airline by passenger numbers, said the move was made to comply with the Irish Commission for Aviation Regulation, whose demands, it said, were in line with demands made by the CAA, which had to be completed by a deadline of 1600 GMT on Friday. "There won´t be more flight cancellations caused by the quadrants this winter or in the summer of 2018", said the executive. "It's only when we get to steps of court action very often that they are prepared to comply with the law", the CAA's Haines said.
Ryanair spokesperson Kenny Jacobs said on Friday the airline would take on extra staff in order to deal with the fallout of the cancellations.
Among other complaints, the United Kingdom regulator said Ryanair had repeatedly failed to inform passengers about all the expenses they could reclaim in connection with flight changes.
As it did when announced the first round of cancellations, the CEO of Europe's leading low-priced airline, once again called for "heartless apologies" to affected customers.
It is promising over 1 million seats from £9.99, with some flights to France going as cheap as £4.99.
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