"Times Higher Education"s 'Table of Tables' is the combined results of the three main UK university league tables - the "Good University Guide" (published by "The Times" and "The Sunday Times"), "The Guardian" and "The Complete University Guide". In the Table of Tables 2015, Heriot-Watt was placed 27th in the UK and 3rd in Scotland. It is ranked 28th in the UK by "The Complete University Guide 2018" and 26th in the UK by "The Guardian" University League Table 2018. In a 2015 detail report on UK universities, Durham academic Vikki Boliver placed Oxford and Cambridge in the first tier, and included Heriot-Watt in the second tier made of the remaining 22 Russell Group universities and 17 other "pre-92" universities.