Oh, not again.
Read Snowden's revelations, read Shrem's argument, this situation was never about the corporations on any side of the pond. It has always been about governments illegally accessing / demanding data to which they have no right. At one time I could just point to the USA, but now it's the UK too.
'National Security' is being used as a cover excuse for anything the agencies might even think ( sorry - one sentence with agencies and think in it,) that they might vaguely, just possibly sometime in the future like to have a laugh^Wlook at. Along with terrorists and peodos of course.
Nothing has changed, if you have a contract with a US / UK company to safeguard your data you've wasted your time. It means nothing, it will not stop the 'authorities' getting access. You most likely will never even know that the data has been accessed.
It isn't contracts that need to be changed or renegotiated, it's laws. Until governments can be forced to remember that they are supposed to be servants of the people, rather than masters of the rabble. nothing is going to change.
Roll on the revolution.