We are sorry to know the news of removal of one mirror out of 5 from UK.
I am currently running a CentOS Mirror (Here in a UK Data Centre) for personal use. I run a private mirror of both x86 & x86_64 of CentOS v5. I do have quite a large Monthly bandwidth allowance as well. What are the typical stats of a mirror and I will see if I can turn my private mirror into a public one...