Problem is the ranking you are using is just based on business. If you look at real estate research they are no 1 in UK and Europe.
When looking at one of these masters programmes in real estate, real estate finance etc then subject ranking at postgrad and reputation in the industry are probably two of the most important metrics. In UK they are dominant and a target university for all main global real estate firms (CBRE, Jones Lang, Savills, Wakefield, etc), real estate developers (Grosvenor etc) and into real estate investment - IB real estate departments / RE private equity. Industry reputation and brand are important.