You do not have to tell your employer if you have hepatitis C. But if it physically affects the way you perform at work, your employer may have legal obligations towards you under the Disability Discrimination Act.
Disability Discrimination Act
If you're covered by this act, your employer is obliged to give you permission to be absent during working hours for rehabilitation, assessment or treatment, or to alter your working hours. For more information visit DirectGov
You may be entitled to statutory sick pay to cover any medical appointments or sickness absences. Details of the latest statutory sick pay entitlements and other advice can be found on DirectGov
Information is also available on the Hepatitis C Trust website
For confidential advice about any benefits you maybe entitled to and how to claim them, contact the Benefit Enquiry Line on 0800 882 200.
See also the Hepatitis C Trust website