If my memory serves me correctly the now defunct Maersk Air used to run a service from Billund to Southend using Dash 7 and occasionally, when the load warranted it, putting on a 737. I may be wrong but I always thought that this route was quite successful. I heard, when the service was withdrawn, that Maersk blamed the council (the then operators) as they were full of promises about forthcoming improvements to the airport but nothing ever happened. If it is believed that Scandinavia could be a viable proposition for SEN would this not be a route for Stobart/Flybe to consider?