To pursue a claim for constructive dismissal, you must be an employee. Even if your contract or employer states that you are self-employed or a worker, you may still have employee status based on the nature of your work relationship. However, if you weren’t guaranteed regular work and could send a substitute, you might not meet the criteria for employee status.
Typically, you need at least two years of continuous service to claim constructive dismissal. But there are exceptions, such as resigning due to specific automatically unfair reasons.