First of all, I am going to talk a little about the difference between college and university in the UK, just in case you or someone who reads this does not know what the difference is (the fact that you wrote 'uni/college' prompted me to write this as it usually means that the person who wrote that is either confused or American).
College is equal to the eleventh and twelfth grades of high school or to a trade school in the UK. 'College' refers to university in the US, but in the UK, it is just called 'university'. Sorry if you knew this; I am just making sure the difference is clear.
I am not from the UK and go to university in the UK. I also have a UK high school education, as well as a foreign one, so I can explain the differences if needed. Feel free to ask anything about studying in the UK.