Disclosure between contracting parties, etc.
2. The enactment or obligation does not prevent or penalise the disclosure of relevant information—
(a)between contractor A or an employee of his and authority A or an authorised officer of that authority;
(b)between contractor A and an employee of his or between one such employee and another; or
(c)where the relevant function has been delegated to authority A by another Department, Minister, office-holder or district council (“authority B”), between contractor A or an employee of his and authority B or an authorised officer of that authority,
if the disclosure is necessary or expedient in or in connection with, or for the purpose of facilitating, the exercise of the relevant function or a related function or the performance of ancillary services.