If you and your partner have decided that you want to get divorced, you will have to follow the legal divorce procedure. First you will have to satisfy the 'grounds' for divorce- that your marriage has broken down irretrievably.
[See Grounds]. Once you have established the grounds for your divorce, you will have to apply to court, filing a divorce petition setting out why you want a divorce. If your partner accepts the divorce petition, then you can apply for a 'decree nisi'; a document by which the court agrees to the divorce. The final stage in the divorce process is obtaining a 'decree absolute'; this is the legal end of your marriage. You can apply for this six weeks after the court has issued the decree nisi. Once the decree absolute is issued, you are officially divorced.