Event context
British Aerospace merged with Marconi Electronic Systems (MES) -- the defence electronics and naval shipbuilding subsidiary of the General Electric Company plc (GEC) -- on Nov 30, 1999, in a GBP 7.7bn deal announced Jan 19, 1999, forming Europe's largest defense contractor, BAE Systems. GEC's remaining (non-defense) businesses were separately renamed Marconi plc, a distinct company unrelated to this transaction. DATA NOTE: "British Aerospace" has no distinct organization row in this database (aliased directly to BAE Systems). "Marconi Electronic Systems" also has no distinct row; "GEC Marconi Avionics" is used here as the closest available proxy for GEC's defense-electronics lineage -- this database's separate "Marconi" organization row most likely represents the unrelated post-1999 telecoms demerger (Marconi plc, later acquired by Ericsson in 2005), not the defense business, and was NOT used here. Confirmed via MoneyWeek/Wikipedia contemporaneous history and UK competition authority merger undertakings documents.