If you have been ill for 7 days or less you don’t need to see a Doctor. Your employer may however require you to complete a self-certification form (SC2) which is available from your employer or on the HMRC website.
Many employers have their own self-certification forms. If your employer doesn’t have its own form you can download the Self Certification Form. Please print it, fill it in and hand it in to your employer. You do not need to see a Doctor.