Ask HN: Any hackers from the UK (or Europe)?

I've been wondering what the startup scene is like in the UK, or Europe in general. I'm a college student in Seattle and was thinking of moving to the Valley after I finish (for grad school possibly). But now I'm thinking about going to Europe, mainly the UK.

This is to anyone outside of the US really. What is it like as a hacker outside of the US? How is the startup scene or tech scene like where you live? What are the advantages and disadvantages of starting a startup, from your experience, in your area? And if you had the choice, would you move to the Valley?

Also, this is my firs post, so I apologies in advance if something is not right.