It is very important that you have booked the appointment for the correct person. Unfortunately the GP will be unable to continue with the consultation if the appointment has not been booked correctly.
If your family member is under the age of 16, then they can be added to your account and you can book an appointment on behalf of them. You can do this by selecting their name from the dropdown list in the appointment section. However if they are over the age of 16, they will need to accept the invitation sent to their email after you added them to your account. They can book an appointment in their account only.