If you’re wondering whether you can claim constructive dismissal without resigning, you must have terminated your contract in order to claim constructive dismissal compensation.
Legally, you are allowed to give notice and still claim this type of dismissal. If you work your notice, your employer could argue that the working relationship hasn’t broken down. You must make it clear in your resignation letter that your reasons for leaving are directly related to your treatment at the organisation, and that your employer has breached the employment contract.