Privacy and confidentiality of patient information

I was interested to note that The NHS Constitution for England which was published this week gives several pledges to patients including:

You have the right to privacy and confidentiality and to expect the NHS to keep your confidential information safe and secure.

This is a vital issue where, I feel, we need still to get clarity about how this will be achieved - particularly in the light of Tony Collins Blog post this week Post-it notes for passwords - an NHS option? about the culture of shared passwords in the NHS.