Forty years ago, London University was still offering degree registration to "external" students, who might be living anywhere in the world. To prepare themselves for the London exams, many studied at local institutions; but it was also acceptable for external students not to study at any institution but to study "privately". Some of these "private" students had private tutors, while others studied wholly on their own, without any tuition, and after being registered for the required period of time they presented themselves in a London or London-accredited examination room and sat the exam papers. Fees were paid both for registration and examination. For many decades, the availability of degree examinations to private students was considered one of the special features of London University.
I am not asking for recommendations, but are there any British universities nowadays that register and examine students who study wholly on their own?
Note that I am not asking about degrees by "distance learning" in which coursework is required and tuition bought from and given by the degree-awarding institution, or by an institution accredited by it, although it is possible that the kind of degree registration I am asking about might be considered a sub-category of distance learning.