If you would like to add/link an adult to your Health App account, please contact your GP surgery directly.
Your GP will be able to add/link an adult to your Health App account for you.
Not all GP surgery's may offer this service.
Both adults must be registered at the same GP surgery and you must be registered, with a Health App account, to request to add/link another adult to your Health App account.
Only your GP can approve and configure linked accounts.