Logic wrong way around. Draw a map showing the time boundaries between DSA, LBA, EMA and MAN. Calculate the number of ABC1s within the DSA catchment. That is your potential core market. Proposition 1--- most of the best postcodes in W and S Yorks are not in the right place for DSA. Proposition 2 --at £1.30 a litre for petrol, the long distance market is a thing of the past. Proposition 3 the ethnic market at a place like DSA is weak. Proposition 4 --there is capacity at the competitor airports. Proposition 5 --inbound market attractiveness is weak. Result--it's a struggle to achieve lift off in terms of the range of destinations which can be offered.