Meanwhile, the Irish authorities are understood to be looking into the sale of shares in Ryanair by two of the airline founder's sons, which occurred roughly two weeks before the company warned on profits.
Two of Tony Ryan's sons -- Shane and Cathal -- sold 6.4 million shares in the middle of last month, just before the company warned that if trends in fares continued its net profit for the year to end-March would fall by about 10 percent.
That profit warning saw the company's shares lose more than a quarter of their value.
The Irish Stock Exchange investigates any share dealings in the weeks preceding a profit warning as a matter of course.
Neither Shane nor Cathal is a director of the company, although the latter is a former non-executive.
A spokeswoman for the Ryan family said she believed the inquiry was nothing more than the run-of-the-mill investigation that takes place after any profit warning.
Shane and Cathal are believed to have sold their shares at roughly 6.90 euros each. After Tuesday's EU ruling over Charleroi airport, the shares closed in Dublin at 4.90 euros.
RSS