 The airline said that its head office building, which was stated by the "International Business Times" to require refurbishing, was too large for the company's needs following the "Greenfield" cost reduction programme.On 8 November 2011 Aer Lingus signed the contract with the Dublin Airport Authority for the surrender of the leasehold interest in the HOB Site.Aer Lingus would pay €22.15 million and interest to the DAA, with €10.55 million being paid over ten years in annual payments, with each being equal size.