Do Hampden's clients know that State Dept snoops can now get their data?
At leas, that's my understanding of current US law. Regardless of the data centre being in the UK. IANAL, and I could be wrong, of course.
Oracle is becoming a British banking back end, with its data centres about to start holding the money and details of some of the UK’s wealthiest citizens. Hampden & Co, due to launch in the first quarter of 2015, has picked Oracle’s Flexcube as its core banking platform, the database giant said Tuesday. Unlike other Flexcube …
Try reading this (http://www.theregister.co.uk/2014/01/31/eu_us_data_transfer_to_be_suspended_if_united_states_does_not_fix_probs/)
EU law does not allow the export of EU citizen data to the US. A US jurisdiction may issue a subpeona against a US company to provide data that may be residing in the EU (e.g. see what is happening in Ireland with Microsoft at the moment) but that subpeona (or any other US legal instrument) does not give any legal basis to that data being provided to any US body - i.e. a US subpeona does not give the legal right to a US company to break EU (or any member state) law. The company holding the data would be breaking EU or local country law if the US company were to comply with the subpeona. Technically the company may be in breach of US law by not complying, but that's their problem.
Of course, what actually happens is that the US body (aka NSA) simply takes the data anyway without any legal basis (often with the aid of GCHQ of course). In this situation, the fact of who is the ultimate owner of a company or in which country the company is registered is totally irrelevant.
In other words if you think your data is safe from the prying eyes of multiple governments in any company or country these days, think again.