The numbers for this argument are well known, by collecting more we would only be adding a spade-full of data to an existing mountain. Witness the high number of website mirrors so that you can download software from a server near to you, and websites that cleverly (and transparently) re-direct you to a server that is near to you by doing a reverse IP lookup.
That said, a UK solution might be outside of the budget. Hosting in the US is always cheaper. For what occassional benefit their might be, the financial cost may be too high.
However, as per my previous post. If someone tells me what features are required of a UK based service, I will happily look through the information I have collected over the years to see if there is a viable UK or European option.