Go to this website (Queen Mary's home page)
1 Click on the second white icon under the logo of Queen Mary on the homepage.
2 Find the A-Z course finder in the box on the left below the displayed campus picture.
It shows all the majors in this school in alphabetical order. Click on the one you are interested in, and all the information is in it, including how many years you have studied this major and what you have learned every year.
Look down along this page (there is a blue dotted line under the subtitle of each introduction, look down along this page). Generally, you can find the admission requirements at the bottom, and click on his link "Detailed Admission Requirements", which is his requirement for all courses that can apply for their school.
As for the language, I didn't find his requirements for IELTS, only gcse (the general term for senior high school education in Britain).
My classmate is in Queen Mary. If she applied for business IELTS, it seems that she only got 6.
If you want to find a preparatory course, you should also see the basic course in the subject options.
If you apply for a graduate student, click the third white icon on the home page, and everything else is the same.