University College London (UCL)

I finished both my bachelor and my master's degree at UCL, and I had an absolutely outstanding experience studying there. 

The lecturers and professors are beyond professional and rank among the best in their respective fields not just on a national level, but on a global scale. 

The various libraries are fitted with almost any book and document you will need for your studies, with ample opportunities to make use of British Library (located nearby) or other libraries and archives for any book that you may not be able to acquire at the university libraries. Furthermore, UCL subscribes to several online journals/databases, giving their students access to most of the best and newest research out there. 

There are a few areas that could use some improvement, such as the student accommodation that is more expensive than what most students can afford, at least without taking loans, and on top of that, much of the accommodation is of a poor quality.
The campus also lacks space for students to study at the facilities. This includes both tables and rooms fitted for that purpose as well as available computers (usually located at the libraries). In addition, the libraries could use more printers/scanners, as it is not uncommon to wait in line for 15-30 minutes before you can either access one of them and/or access one of the computers connected to them. 

But overall, in terms of the lectures offered to the students, and the qualifications of the doctors and professors teaching there, UCL is top of the line.