The fantasy series was dropped by Channel 5 after just two seasons, with no other broadcaster picking it up.
The previous three seasons are now available on Netflix, as well as the currently airing fourth season. New episodes will be added shortly after US broadcast.
The show, starring Jennifer Morrison as Emma Swan, Lana Parrilla as Regina Mills and Ginnifer Goodwin as Mary Margaret has not been on UK screens since season two, with the new deal being the first time season 3 and 4 are officially available to UK audiences.
#OnceUponATime has returned to the UK on @NetflixUK! Catch up on seasons 1-4. New episode weekly, days after the US! pic.twitter.com/Au3ihNd2eW
— ABC Studios UK (@ABCStudiosUK) March 13, 2015
Once Upon a Time continues on Sunday at 8pm on ABC.
