"As long as Ryanair does not make improved offers, there may have to be further strikes here," Ingolf Schumacher of VC said on Wednesday.

Pilots and cabin crew at Ryanair in Germany started a full-day walkout early on Wednesday to put pressure on management in labour talks with Europe's biggest low-cost carrier.

(Reporting by Klaus Lauer; Writing by Maria Sheahan; Editing by Michelle Martin)