If you want to make a relatively simple and straightforward change to your Will, you can use a codicil to do so without having to create a new Will.
Use this codicil if you need to revoke the appointment of a substitute guardian in your Will and appoint a replacement. You might do this if one of your substitute guardians is unable to act as a guardian or if you decide to change your substitute guardian. In all other respects, your Will remains the same.
Please note that you cannot use this codicil if you already have 5 or more codicils to your existing Will, as at this point we recommend that you make a new Will.