To get into universities in the UK, you can target a 7.0 or above band score. Below are some top universities with their minimum band score requirement for bachelors and masters.
University of Oxford- 7.0(undergraduate); 7.5 (postgraduate)
University of Cambridge- 7.0 (undergraduate and postgraduate)
London School of Economics and Political Science- 7.0 (undergraduate); 7.5 (postgraduate).
Imperial College London- 6.5 (undergraduate and postgraduate).
If you need to know all about how to get the top band score, then give this blog a read: https://ischoolconnect.com/blog/all-there-is-to-know-about-ielts-for-studying-abroad/