FBI wants instant access to British identity data

OK, it's a Guardian article and suffers from all the problems pointed out by Ludo in his comment on the entry on the Prum treaty. The small print shows that this isn't specific to the UK-US relationship. But it does seem to be another attempt to evade judicial supervision of data exchange by designating "cyberspace" outside a single country's jurisdiction.
The FBI and other national police agencies have never been great believers in human rights. Nor in the rights of second country nationals, let alone third country ones.