The above dispute has now been resolved, so no longer relevant.
Social Media post from Vintage TV:
Vintage TV We won't be coming back to Freeview. We're in talks to come back to Virgin and we'll be back on Sky before the end of the month.
Looks like it won't be coming back to Freesat, but viewers will be able to tune it in via Non Freesat mode.
In the meantime, some people have been accessing the stream and casting it to their TV as a workaround:
http://watch.vintage.tv