The Aer Lingus chairman, Mr John Sharman, is expected to remain in the post for another three months as the Government continues a search for his replacement.

In an internal note, staff at the airline were told yesterday that Mr Sharman would continue as chairman and non-executive director. It is understood this will be for about three months. Mr Sharman made his decision to stay following a meeting with officials from the Department of Transport.

Meanwhile, KPMG have been appointed to assist in the search for a new chief executive at the airline. Mr Willie Walsh has already indicated he will depart some time before May. Aer Lingus said yesterday it was proceeding with "as much speed as possible".

A board sub-committee has been set up to oversee the whole process. Advertisements are expected to be placed in the national press in January.

Interviews could take place later that month and an appointment could be made as early as February, sources said yesterday. Interest in the position is said to be significant.

In the company bulletin Mr Sharman said: "2005 will be an important year for the company's regeneration making it vital to establish early momentum in all areas commencing on January 1st".

Meanwhile, a leading international aviation publication has strongly criticised the Government's role at Aer Lingus. The journal, Aviation Strategy, in a piece headlined the "the effect of government indecision and procrastination", talks about the airline's managers departing the airline because of frustration with the Government.