Leeds Approach's argument that people from S Yorks and Humberside would flock to Church Fenton could equally apply to people from W Yorks using DSA. It's close to the M18 and the M1, has a big runway and capacity to expand if demand exists. Church Fenton would be, what, 35-40 mins from Sheffield? DSA is only 40-odd minutes down the A1 / M1 from Leeds