> They can summon people and papers in the jurisdiction of the UK. He was in the jurisdiction of the UK? Being in the jurisdiction is literally a land matter,

> They can summon people and papers in the jurisdiction of the UK. He was in the jurisdiction of the UK? Being in the jurisdiction is literally a land matter, being in the UK means you're in their jurisdiction. It's not like you can ignore UK laws because you're American. So your own statement says it was legal. They can compel people to give them evidence. That is what they've done. I did this google search. It just says "They have powers to compel people (but not Members of either House) or organisations (but not the Government) to give evidence, but these are rarely invoked: the information asked for is usually provided voluntarily." Basically, Facebook being non-compliant thinking "We're US based and we keep those documents in the US and don't give UK folk access, there is nothing you can do." And they've responded. > Also, since they are a US citizen traveling abroad, international treaties/law between US and UK would have given him the right to refuse and be compelled through legal process. He could have gone that route, that would have involved sitting in jail while some judges decided what was what. And it seems like since it was Parliament that did it, it would have to go EU courts or Supreme court which both take a while to get to.