I'm currently getting the paperwork done to request admission into an Erasmus exchange program. I've narrowed my options down to University College and Imperial College in London and Copenhaguen University in Denmark, as afaik they have the most reputable physics faculties with courses taught in English (from my list of options). Some mandatory courses at Copenhaguen are taught exclusively in Danish which will likely be a problem for me so I'm thinking of UCL or ICL. What is the environment like at these 2 universities? I'll be doing my 4th and final undergraduate year and some of the courses I'll be taking are: general relativity, advanced quantum mechanics ("II" so to speak, perturbation theory), nuclear & particle physics, electronics and a handful of electives + undergrad project. Anyone with first-hand experience at these 2 institutions as an exchange student?