Hello, I will be applying to universities in England for fall 2016 entry and I have one particular concern. I have studied independently instead of attending an ordinary high school, but I've taken and will be taking various exams. Because of this I have no one who can write a reference letter for me, and it is my understanding that this letter is very crucial to the application. Can I apply without a reference? Will this weigh negatively towards my admission? Can I let the universities know somehow that there is a reason for my lack of references?