Out of curiosity I took a look at the SkyWork website to see the latest state of play there.
The dropdown booking menu still offers the same Sion flights in parallel with the Powdair services. I did not attempt a trial booking. But there is still no other mention or publicity of Sion flights on the website. The Information page which summarises the SkyWork winter program and shows a route map makes no mention of Sion services.
But follow another menu on that page to interrogate Sion routes and it produces the message : Für diesen Zeitraum bieten wir für die gewählte Destination keine Flüge an.
So nothing happening there then. Was it all a bluff, or were they positioning themselves to take over if Powdair failed to deliver ?