I challenge you to make your own, using well defined and relevant criteria, i.e a quantitative study. If you can do this I applaud you, and I also expect you will get some suprises the reason for this is because different universities do better based on slightly different criteria, but if it was so simple t o weed out the criteria, then there would only be a need for one type of methology. NB: Oxbridge uniformally come out on top for all the league tables, so it is easy to justify these are the best two universities in the UK.
Disclaimer: I never claim League tables are perfect, in fact far from so. But they are better at gaining a rough idea of the quality of a university than going after a vauge ghost quantity like 'prestige'. Other valid methods include looking at individual criteria such as research quality.