In defense of Healthspan, they may well have no intention of closing the Southampton route. But as a business they are not known for being Alderney-centric, try booking a room at their hotel in Alderney via their reservations office in Guernsey and you will see what I mean.
None of the proposed buy-out is about Alderney, even when the States of Guernsey bought Aurigny it had nothing to to with Alderney but was to protect the Guernsey to Gatwick route. So long as Bluerigny keep that up then Guernsey will be happy.
As with all things Alderney has a 50% voice about what happens in Alderney and a 5% say when it comes to the Bailiwick.