Since the wings on modern aircraft are highly complex bits of kit that hugely influence aircraft performance and fuel economy, one can only assume this is a bluff on behalf of Airbus. It would take years to set up manufacturing elsewhere to identical standards and in the meantime there is a stock of aircraft bodies building up with no way of making them fly. This would be the end of Airbus, not just manufacturing in the UK. But then we all know that Boeing makes proper aircraft with proper control layouts in the cockpit, not some glorified kiddies computer game with joystick controls.