Most likely the work will be carried out at Rementowa in Gdansk. Stena have worked with them a lot before.
I doubt any contract is signed but the previous poster suggested somewhere warm like Gibraltar, which isn't Gdansk which also isn't warm (except in summer).
Stena Line docks vessels in Gdansk as well no matter which time of the year. I wonder what will be done to the interior though like the MET, cabins etc.., and that this might be the end of the classic liferafts as a previous post told that they are introducing the MES, wouldn't be surprised though as the Stena Saga, Danica, Vision and Spirit also got their rafts removed and replaced by MES. Exciting times ahead though...
I think that was a little bit expected that they want to keep Europe going for a further more years, i am referring to the big works that have been done on the other 80's ferries that Stena Line is using:
Stena Saga: Complete new SPA
Stena Danica in 2016: New propellers, done twice though???, in 2018: new outlet clothing store to take place at the stern of deck 8, new restaurants, bars etc....
Might have missed something though