Would hope that they'd stay year round
Also if they do I don't see why SSH wouldn't work... It's still very warm in the winter !
But maybe that bit on Wikipedia go mean something else. Do Thomson do holidays on behalf of say Jet2 or Easyjet for the winter months ?
Would also appear that Jet2 are continuing ALC through next winter thouh it think that was previously mentioned on this page. Would be great if they kept Lanzarote year round too ! And maybe put a 757 on the canary routes ?