There are many ways in which confidentiality could be breached:
Accessing records that you have no legitimate reason to see, for example your
own, your relatives and friends health records, even with their consent (unless it
is within your job role to deal with such requests)
Displaying information in a way that unauthorised person could see it, for
example:
Leaving workstations unlocked and Smartcards in PCs;
Leaving records unattended or insecure
Disposing of confidential information inappropriately;
Giving out confidential information in person, over the telephone, by fax or email
to unauthorised people:
Holding conversations about individuals where others could overhear