In both the freight and passenger sectors, a small number of open access operators (non-franchised operators of trains) have also emerged (some of which have now disappeared). In terms of train ownership, the three ROSCOs continue to exist as originally established, although some now lease freight locomotives and wagons to the FOCs. They have been joined by a variety of small-scale train owners ready to let old railway stock on short-term leases. Also, Railtrack and its successor Network Rail have also purchased some rolling stock themselves.