If you can apply, the general requirement of British universities is IELTS 6.5. Of course, different majors have different IELTS requirements, and some majors even require more than 7 points. If your IELTS score is only 5.5, you can apply for a language class first. The cycle of a language class is usually calculated in weeks, depending on how many points you have missed.

British universities have clear language requirements. If you want to find an organization to help you apply, you can ask the teacher directly. If you do your own diy, you can go to official website, the school you applied for.

In addition, the IELTS score of studying in the UK can be made up later, which means that you can apply to the school first, and then make up the IELTS score as required after receiving the offer, so you have enough time to take the IELTS test.