BAE Systems Avionics was the avionics unit of BAE Systems until 2005, at which time it was transferred to SELEX Sensors and Airborne Systems S.p.A. (initially 75% Finmeccanica and 25% BAE Systems, but since March 2007 fully owned by Finmeccanica). Selex S&AS became SELEX Galileo in 2008 and from January 2013 (following a merger with other Finmeccanica companies SELEX Sistemi Integrati and Selex Elsag) traded as Selex ES. It then merged into Leonardo S.p.A.'s land and naval defence electronics division on 1 January 2016. The business had its UK headquarters in Basildon, Essex, England.