I have an employee in my team who although he does not have access to some very sensitive information (ie, decisions about the future of the company) is certainly in a position to know that certain things are planned because of his proximity to senior staff and coffee machine chatter within a small and secretive group of people. Last week, during a phone conversation with other members of the team, he used the company instant messenger account to send a jokey message to another member of the team, in which he referred to this confidential information along the lines of "so mate are we selling this company (named) or not?" The problem arises because although the target of his message has an unusual name, there is another individual within a different part of the business with a similar name. And he messaged the wrong one (there are two letters different in the surname) In other words unintentionally a secret has been leaked (or more probably a rumour started). What is the position on this from a UK employment law perspective? Ground for dismissal?