A £50m extension to Dublin airport is out to tender. Designed by the London office of Skidmore, Owings & Merrill, it is the first European airport project by the US architect. An elevated, covered walkway will connect the extension to the terminal and sweep in a wide arc around the listed 1920s building. External walls and internal partitions will be glass, with ceramic fritting applied to create semi-transparent and opaque surfaces. The extension has 12 boarding gates. Lead consultant is Irish consulting engineer Project Management. The project has been opposed by Irish budget airline Ryanair, which has campaigned for a larger free-standing terminal.