|Vassar Library / My Happy Place|
Always happy to add my two cents to the stockpile of advice you're gathering! I read/majored in English when I went to uni and I have a Bachelor of Arts. When I was looking at schools I knew I wanted to be a writer so I researched schools which had respected English departments and offered classes in creative writing. Like most American universities, mine had a specific creative writing track, a sort of 4 year basic suggested course plan for those who wanted to graduate and be writers. This was at what we Americans call the under-graduate level, but I believe Brits call graduate level.
For post-graduate work there is the MFA, the Master of Fine Arts, which I do not have and have never had an interest in pursuing -- though that is probably because I went to an undergraduate school which offered creative writing.
(I feel I should add that I know some working writers who did NOT study creative writing, and I know some people who did study creative writing and have not written seriously since school.)
And while I'm thankful that my university acknowledged that creative writing should be available to more than just post-graduate students, I'm also grateful that I was required to take some courses outside of my major -- because those courses also taught me how to write. Not in terms of clarity of syntax or strength of metaphor or any hogwash like that, but by giving me whole troves of information I might not have dug up on my own, and by requiring me to read at a depth and breadth I would not have otherwise.
All of which is to say, if you want to write like Philip Pullman, take an intro physics class; if you want to write like Edith Wharton, take a sociology class; if you want to write like Ernest Hemingway, take a history class -- you get my drift. A diversity of learning will teach you how to think, and learning how to think is the most important part of being a writer.
(By the way, an American writer named David Foster Wallace said as much, but better than I ever could. You should read his speech to recently graduated students here.)
If could add one other snippet of advice, could I also please add: read everything. Dumb stuff, great stuff, vampire stuff, Holy Roman Empire stuff, science stuff, poetry stuff, everything stuff. And when you read something you like, find out what that writer liked, and read all that stuff too. Never stop reading.
I wish you the very best!