I completely understand where you are coming from! One of the main reasons for the Virginia datacenter was to improve performance for many users across the board.
While, like you said, we currently don't have a datacenter in the UK, doesn't mean it can't happen.
We're very transparant with our goals as a company and when we take on a new project, so even though there is no current plan to open one up in the UK, doesn't mean it wont happen.
As our company grows, so will our datacenters!
Let me know if you have any other questions.