I study fashion at college, ive applied for uni via ucas, when can i start expecting interviews?

I got my first offer after I sent my UCAS form off after about 2 weeks. Withing the next 2 weeks I got another 3 offers. I'm still waiting on another one though. So it could take any amount of time really, some universities are faster than others. Not all of them will interview by the way, just for some courses.