Could virgin run from dsa ? Perhaps Aberdeen or edi ?
Why? DSA is well below expectations even as a low cost airport. If it was going to support any feeder into a hub, it would surely be KLM to AMS. Given the short life of the KL LPL route, I don't think they'd be looking at DSA any time soon, and nor would Virgin.
Too far from Sheffield, Doncaster is too small and both are close enough to London for the ptp traffic. Even LBA is only returning now BA can feed their wider network, compared to BMI & Star who left the route.