I narrowly missed my first choice, so I plan on calling them up and seeing if I still have a possibility of getting in. Additionally, I got into my insurance, but I'm having cold feet about going there. Am I allowed to call up universities and see if they'd accept me for clearing, THEN, if they say yes, negotiate a release from my insurance choice and attend the other university through clearing?For reference, my insurance is Birkbeck (economics) but I am 18 years old so I feel like I may be too out of place there. My first choice is University of Manchester.