I just noticed that book reviews, documents, conference reports, and other short pieces in the International Journal of Refugee Law (IJRL), the Journal of Refugee Studies (JRS) and the Refugee Survey Quarterly (RSQ) are freely available (gratis OA, not libre OA!). In JRS, this type of content was free as of the 2005 volume; I'm not sure about the start date for the other titles. (Several articles are available free of charge, as well, but that's not a recent development.)
This is no doubt the case for other Oxford Journal titles too. Perhaps because it's Open Access Week? I don't know, but check it out!