You only need a doctor’s note if you are unable to work and are ill for longer than seven calendar days. You can send sick note requests via our online consultation service if you have already been seen by the doctor with the problem. To request a repeat sicknote please wait until the date of your current sick note ends.
Use this the link to submit your sick note request(accurx.com)
Go to the NHS webpage: When do I need a sick note?
For shorter periods of illness use the below online service to complete a self-certification form or you can collect a paper copy from reception.