I have been a lead hand for 7 years and was given a letter today informing me I will be transition to a material handler. In this role my salary will remain the same reporting to the same manager. Is this a constructive dismissal.

Despite the fact that your salary will remain the same, this may constitute a constructive dismissal given that it appears to be a significant demotion and a change to your duties and responsibilities. Prior to alleging constructive dismissal, please contact our firm to discuss the matter in more detail and determine how we can assist you.