Why is UK uni so expensive?

Could you elaborate on the reasons behind the high cost of education in UK universities? Is it primarily due to the quality of teaching, the extensive resources available, or perhaps the prestigious reputation of these institutions? Are there any specific costs that contribute significantly to the overall tuition fees? Additionally, how does the cost of living in the UK factor into the overall expense of studying there? It would be helpful to understand the breakdown of these expenses to gain a better perspective on why UK universities tend to be pricey.