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).
It then merged into Leonardo S.p.A.'s land and naval defence electronics division on 1 January 2016.
[1] The business had its UK headquarters in Basildon, Essex, England.
BAE Systems Avionics has a rich heritage which dates back to 1909 when the Elliott and Marconi companies began to fit aircraft with systems (beginning with embryonic air to ground communications).
By 1913 Elliot's avionics product lines advanced to gyroscopes, weapon sights and altimeters.