My responsilities have been assigned to other employees to save company money. Does this qualify as wrongful dismissal? I have never received notice of any wrongdoing in the 6 y with the company -only excellent job appraisals and performance awards

Thank you for your question. If the employer has made a unilateral decision to assign your duties to another employee - without notice to you or without any problems with your performance - then this could constitute constructive dismissal of your employment. I strongly recommend that you speak with a lawyer.