In the event that you hold a personal account and also act as a signatory for a charity, and you want to register both for online banking, you will need to complete the registration form separately for your personal online banking and your charity online banking.
This is because account numbers are directly linked to the customer type and profile, i.e. a personal customer can only see their personal accounts on online banking and a charity customer can only see their charity accounts.
If you act as a signatory for more than one charity, you will need to sign these up separately as well since only the relevant accounts for that charity will show online.