Yup. This falls into "There are exceptions but it's rare." The UK, Norway, to some extent Denmark, are much more open than say Italy, Germany, Spain, or France

Yup. This falls into "There are exceptions but it's rare." The UK, Norway, to some extent Denmark, are much more open than say Italy, Germany, Spain, or France. Top-tier places in the UK are very open and international, mid-tier places aren't as diverse as mid-tier US or Canadian universities.