Absence of more than 7 calendar days
If your absence continues into a second week, you will need a medical certificate (Med 3) signed by your GP to cover the period of absence beyond the first week.
Your manager will also send you a self certificate. You should complete both of these and send them to your manager as soon as possible.
The Med3 certificate will state that you are either unfit for work, or may be fit for work taking account of advice provided such as a phased return, altered hours, amended duties and/or workplace adaptations. It will be up to your manager to decide if they can accommodate this.
If your absence continues, you must make sure that you send medical certificates to your manager on the due date. You should also telephone your manager weekly to let them know how you are progressing. Call your manager each time you see your doctor for a new medical certificate, so that you can report the outcome of that visit.