Boeing ( NYSE: BA) is set to take control of part of Spirit AeroSystems' ( NYSE: SPR) operations in Belfast, Ireland, alongside rival Airbus ( OTCPK:EADSF) ( OTCPK:EADSY ), as efforts to find an independent buyer for the site have so far fallen short.

Britain's competition regulator said on Monday it has started a Phase 1 investigation into Boeing's planned acquisition of Spirit Aerosystems , setting a deadline of August 28 for a decision.

Boeing's impending acquisition of Spirit AeroSystems is under investigation by an antitrust regulatory agency in the U.K., which could result in delays for the deal. Boeing increases 737 Max production,