Shed on a pole
I agree trains are very important part of any integrated transport policy particularly at an international airport like MAN
i 'm surprised that you can't do the airport to NCL though? i would have thought you could change at Leeds for York and onto NCL or do you mean without changing trains, frequency is important of course and given the variable nature of luggage retrieval a frequency of less than hourly is unacceptable unless less its to somewhere off the beaten track (no pun intended)