Regardless of who the operator may be an A319 will be able to operate in/out of the planned new SEN, larger aircraft operate in/out of shorter runways around Europe, whether SEN's aircraft will be painted in an orange & white livery remains to be seen and something I, personally, have my doubts regarding.
NorthSouth ..... With your wealth of knowledge are you categorically stating that, let us say, a Spanish operator will not be able to operate an Airbus or a Boeing PMI/SEN/PMI and/or BCN/SEN/BCN etc?