In 2008, 18 of the then 20 members were positioned in the top 20 of Research Fortnight's Research Assessment Exercise 'Power' Table. The other two places were occupied by Durham University and Queen Mary University of London, which were not then Russell Group members but have since joined. The two Russell Group institutions outside the top 20 were QUB (21st) and the LSE (27th), while the other two universities to have since joined were York (22nd) and Exeter (25th). In the equivalent table for the 2014 Research Excellence Framework, the 24 Russell Group members occupied the top 24 positions, with the University of Lancaster in 25th being the highest-ranked non-Russell Group university.