I've just searched for average salary of Law graduates from UK universities. To be fair, these figures are from 2017/2018:
From 99 universities, median salary 5 years after graduating:
21st place Leicester University £32,800 (at the time, and in some or all cases perhaps still, this was higher than York, Newcastle, Liverpool, Sheffield).
59th place Nottingham Trent University £24,800.
71st place Lincoln £23,700.
No figure found for Royal Holloway.
Leicester University is the 26th best university in the UK and the 46th best university in Europe for Law, according to edurank.
Royal Holloway is 47th and 119th respectively.
Nottingham Trent is 57th and 177th.
Lincoln is 87th and 315th