I honestly can't give a simple answer to that - but I will tell you my opinion!
Firstly, I think doing a joint honours degree, or degree that covers multiple subjects, is definitely good for employability. That's why I chose to study journalism and creative writing, as it opens up careers both in journalism, and more general writing-based roles. Both sides of the course have given me different opportunities, which means I've had a variety of lots of different experiences to talk about when applying for my placement year roles/internships.You also learn different skills from each side of your course, which makes you more well-rounded. I think both my creative writing skills, and my ability to write factually, concisely, and to a tight deadline, for example, have helped me land my Communications Intern role for my placement year.
But employability will depend on exactly what career path you want to take (eg. whether you would need English Literature experience) and what other experiences/work you have produced, as getting a job is so much more than just your degree.
Ultimately, I don't think doing/not doing English Literature would limit your career choices, as there are few jobs that specifically require studying English Lit, and so you could still access these with a pure Creative Writing course. But I do think it's great to have a breadth of experiences and skills, especially if you're not 100% sure what you want to do after graduating - so if you think you would genuinely enjoy the English Literature side, it might be worth considering!
Again, our academics should be able to give a broader opinion on this, and our employability team is there on our Open Days too to help out with career-specific queries 🙂 !