This is true, a friend of mine who works for aviance at BHX told me that on the Air France and KLM flights that as much as 80% of the pax are transfer, therefore although we have service to AMS and CDG to serve city-to-city pax, EMA currently offers no real transfer opportunities. bmi regional does interline with other carriers at BRU, but this is not a major hub in the same league as AMS, CDG or FRA. The only obvious issues I can see with any hub carrier or their subsidiaries launching flights to EMA, are slot availability and the risk of cannibalising their flights from BHX.