Latest: Ryanair regrets 'unnecessary' four hour German strike threat

Update 5.45pm:  Ryanair sincerely regrets receiving notice of a threatened four-hour pilot strike in Germany tomorrow.

Update 5.45pm:  Ryanair sincerely regrets receiving notice of a threatened four-hour pilot strike in Germany tomorrow.

In a statement issued by Ryanair, the airline said the disruption is "unjustified and unnecessary".