Just to add the point that Spain pretty much owns UKs aviation industry as both BA (technically) and LHR are both Spanish owned. In fact only EasyJet and Manchester airport are British owner among the main elements of UK aviation as to add to the above Ryanair and LGW are both non UK owned .
Compare that with France or Germany where it would be unthinkable and indeed where the legacy state carriers own substantial foreign airlines. Or in Donald World where ownership of an airline or airport by a foreign entity is probably illegal.