Interesting post on Swansea Airport's FB page earlier today announcing the resumption of scheduled service(s)...
Scheduled Services Are Back! Swansea Airport are pleased to announce that Scheduled Services will re-launch from Swansea Airport this year! The end of March will see the start of services between Exeter & Swansea, joining the airport with Exeter provides interchange access to airports across the UK as well as the Channel Islands, Ireland and Spain. This is the first step in a long planned improvement plan for the airport which will see further infrastructure & services returning to the Airport over the year.
Speculation in the comments that it's Air Alderney who will be operating these flights, however the Airport have said that "Details of the operator are due to be published shortly along with the full schedule. However, full confirmation has been received today."