Airbus would have been leaving regardless of the deal on the table as it's a highly politicised company set up by the EU in the first place. They won't allow any of its significant business operations to remain in a non-EU member state for long, primarily because it's a job creation racket that relies on illegal government subsidy.
UK manufacturing still faces two problems though: maintaining EU certification/license to export post-Brexit, plus whether supply-chains will continue to run as efficiently (if there are long queues at the border you can forget JIT).
