employers are entitled to make key business decisions and if those decisions are not accepted by a worker who is dismissed or who leaves as a result then the employer may be able to win a subsequent unfair dismissal case on the basis that the dismissal (or constructive dismissal ) was for "some other substantial reason" within ERA 1996 s.98(1)(b) provided, of course, that the reason was not trivial and was genuinely believed to be fair in the mind of the employer at the time.

For relevant general notes see Unfair dismissal/reasons making dismissal prima facie fair/some other substantial reason (''SOSR'') and/or Changes to terms of employment .