[dharma1]

The extradition request was just signed by the UK home secretary - https://www.bbc.co.uk/news/uk-48624024

Now the court system will decide over the coming months/years whether or not to hand him over to the US, where he has a good chance of being imprisoned for a very long time.

[sschueller]

I think that just means the request valid (correctly filled out form). If it is legal gets decided in the courts.

[makomk]

It means that the current government has decided they want to support his extradition on these grounds. That's why the Home Secretary has to approve the request - there's a political aspect to extradition.