1. The renewal by experience only requires you to do a training flight or 1 hr. Note this is not a test, but other threads debate this.
2. Any instructor for the PPL can do the training flight and sign your logbook. Only an examiner can confirm this in your license.
3. Errr. What other training organisation other than an FTO could do it. BSM
4. I don't think Permit to fly types can be used for SEPL class ratings it must be Group A. Awaiting correction from other Ppruners though.
5. Subject to it being group A, no problem.
6. Sorry, I'm from the North West.
Good luck.
FIS