And given how the UK government loves nothing more than to be the lapdog of the US, I have no doubts it was done entirely voluntarily.
Eagerly even, as an opportunity to show off just how extra exceedingly loyal minions they are.
Frankly, I have little doubt that the UK government participates so eagerly that just occasionally some of their US counterparts must be a little bit embarrassed on their behalf over seeing their total lack of self respect in trying to impress.
Which you know - is still illegal to have. Though it's funny how the Guardian thoroughly underreported that fact.
It is, however illegal for someone with a clearance to mishandle classified material. "Mishandling" includes "Permitting access to classified material to non-cleared personnel.". If you mishandle classified material you may be reprimanded, have your clearance revoked, be fined, or go to jail for a very long time.
In the case of the Chinese hackers, they were spying on reporters to discover their sources.
What they appeared to be looking for were the names of people who might have provided information to Mr. Barboza.
http://www.nytimes.com/2013/01/31/technology/chinese-hackers...
AFAIK we don't have evidence of similar US spying for the purpose of blackmail, harassment, etc. because my concern is whether the NSA might use its sources for those ends.
Miranda's detainment, confiscation of the memory sticks etc was to be expected - as far as the UK Government is concerned he's carry stolen state secrets.
What I don't really understand is why he flew through London carrying them, I believe Madrid has more routes to South American - I wonder if he was routed so he would be picked up for massive publicity.
Further, the break-in to Greenwald's residence and theft of his machine.
As well as the visit to the Guardian and destrution of machines....
The evidence is crystal.