[jonbxx]

Airbus, like any large manufacturer would need to balance friction vs. costs of both moving and manufacture. The cost of moving is pretty much set and Airbus already manufactures in China and US so it would be more expansion than setting up new plants.

The UK is an expensive place to makes things. This will be balanced with frictionless movement between the UK and Toulouse so things even up. Airbus could move wing manufacture to the EU zone where the costs would be similar but frictionless or somewhere cheap and accept the friction costs. Expensive and friction doesn't add up.