When do I have to send my high school transcripts to universities in?
I dont know about the UK, but in the US, the college application process happens in the fall (autumn). Students send in their applications, transcripts, essays, resumes, etc. during October-February, depending on the university. Each university has its own due dates, and some offer early admission and/or early action. I strongly recommend that you work with a college counselor, as the process is fairly complicated. By the way, high school, not the student, sends the official transcript directly to the university.