Your employer is under a duty of care to provide you with a safe working environment and to ease any sources of workplace stress.
If you have a pre-existing mental health condition such as depression, you need to inform your employers of this as well as it could potentially be a disability and therefore they will be under a duty to make reasonable adjustments to your working environment.
As you have over two years’ continuous employment, then you may lodge a Claim with the Regional Employment Tribunal for Unfair Dismissal if you are Dismissed or forced to leave your job because of the way your employer has treated you, which is a Constructive Dismissal.
Your employer must follow a fair Disciplinary and Investigation procedure before they decide to dismiss you.
However, if you have been Dismissed or Constructively Dismissed based on an Inadmissible Reason, then the Dismissal will be Automatically Unfair regardless of the length of your Employment. Inadmissible Reasons for Dismissal include Dismissal on the basis of a Protected Characteristic (Age, Disability, Race, Religion or Belief, Sex, Sexual Orientation, Marriage/Civil Partnership, Pregnancy and Maternity, Gender Reassignment), for making a Disclosure In The Public Interest to a Prescribed Person within your Employer or external Regulatory Body (i.e. “Whistleblowing”), Trade Union membership or activities, asserting a statutory right under section 104 of the Employment Rights Act 1996 (“ERA”) or for a health and safety reason under section 100 of the ERA.
In Discrimination and Whistleblowing cases, in addition to the Basic and Compensatory Awards for Unfair Dismissal, you may also claim Damages for Detriment and Injury to Feelings.