The Spanish needed the Germans to sort out their auto industry, now it is the turn of the Brits to put IB into shape.
Vuelling and IB express are a good start, move all the shorthaul to those 2, turn them into a LCC and have IB focus on just longhaul to the markets that they are strong in (that's is few if any, but it can change)
They just need to sort out their service, fleet and attitude. IB ranks as one of the worst carriers in the world (as voted by their own pax).