Ryanair Holdings Plc on Thursday received a license from the British aviation regulator that will allow it to operate within the UK and to non-European Union routes even if the country leaves the bloc without a deal.

Britain's aviation regulator on Wednesday announced legal action against budget airline Ryanair over its refusal to pay compensation to passengers affected by strikes this summer.

Europe's biggest low cost airline Ryanair is not seeing any impact from Brexit on demand for flights, and is prepared for a no-deal, chief marketing officer Kenny Jacobs said.

French authorities said on Friday they seized a Ryanair plane, forcing 149 London-bound passengers off the aircraft, to get the Irish low-cost airline to repay illegal public aid, the latest in a string of troubles for the carrier.

Low-cost airline Ryanair has sacked six cabin staff over a photograph of them appearing to sleep on the floor of an airport crew room, insisting that the picture was staged to back a "false claim."

British police are investigating after footage of a man shouting racist abuse at an elderly black woman on a Ryanair flight went viral over the weekend, with the airline facing criticism over how it dealt with the incident.

Lufthansa and Ryanair-backed carrier Laudamotion settled a dispute over leasing contracts, avoiding a London court hearing that was scheduled for November, both airlines said on Tuesday.

Ryanair canceled scores of European flights on Friday but downplayed the impact of a strike that unions hoped would be the biggest in the airline's history.

Ryanair said on Thursday it would invest $400 million on establishing hubs for its planes at two French airports, returning to heavily unionised France after the airline's decision to recognise unions.

Ryanair faces a one-day walkout by cabin crew across five countries on September 28 as unions step up pressure on Europe's biggest budget airline to accept local contracts.

Ryanair warned Tuesday that it may slash jobs and close some bases in Germany if it is hit with more strikes, a day before a planned work stoppage for better pay and conditions.

Low-cost airline Ryanair has reached an agreement with its Irish pilots in a labour dispute, both sides have announced.