Edinburgh loves international students. I think it is around 40% international this year, and the uni wants to bring this number to 50%. If your GPA and rec letters are good, you will be good to go. I met someone who did masters program at Edinburgh from UDel, for example. Go for free tuition and get excellent grades as an undergrad. Philoshophy and English Lit is the most competitve subject at PPLS for undergrad, not sure about grad, though