SOU-ANR was a five times a week flight, if I am not mistaken. How would Loganair do that operation-wise?
The only hope would be for an aircraft sitting idle at SOU during noon that would loose more money sitting on the ground than operating a quick rotation to ANR. As VLM continued to/from HAM and some passengers were not ANR-bound, the poor loads would be, howeer, even poorer for such a stand-alone SOU-ANR service.
In short, it is more likely that Northern Ireland wins Euro 2016 than another airline taking over the route. The only realistic chance is that VLM-founder Freddie van Gaever will launch, as announced, VLM 2.0 and continue the route.