I was offered an unconditional offer for Japanese without an interview, though a) I applied in September (and got my offer sometime in November) b) I will not qualify as a mature student. From what I've read on TSR, as well as from personal experience (for those I already know at SOAS) there isn't an interview, or at least I've never heard of any. Finally, I was notified through UCASTrack, and have not received anything through the post. Hope this helps! Ganbatte!