Updated timetable 16/01/2022 (source https://www.anes.gr/el/dromologia/sporades)
The Proteus ferryboat starts with sailing on Monday the 17th of January to and from Volos and from Wednesday (and every Wednesday, Friday and Sunday) to and from Mantoudi.
Source: https://www.anes.gr/index.php/en/itinerary/sporades
Easyjet will fly to Volos airport starting on the 2nd of April 2021 from London Gatwick.
skopelosnews 
the timetable here seems at odds with the one on ANES website on Saturdays. so best check on their site to make sure
Thank you Martin, they changed it last night. I copied the information from their website too.