This is a really important point that I'm sure will matter a great deal to many special guardians. I'm going to try to answer all your questions, though not necessarily in the order you've asked them, and provide information that should be useful for you.
- - Once they have been named in the will (or other document, but probably best to put it in a will), and BOTH special guardians have died, testamentary guardians do not have to do any more in order to get parental responsibility.
- HOWEVER they do not have the 'enhanced' parental responsibility (exclusive right to exercise PR) that special guardians have. Parents who thought they could take their child back would not have to get the court's leave before going back to court for a Residence Order, for example.
- Birth parents still being alive does not prevent someone from being a testamentary guardian.
- Special guardianship does not pass on to the testamentary guardian, so the support package would not automatically pass on either. It might be advisable for the special guardians to talk to the local authority in advance about how they would support the testamentary guardian should the need ever arise (hopefully it won't!), and the testamentary guardian may want to apply for special guardianship themselves, and ask at that point to be assessed for their support needs.