I received an email from the AVA today. It says that since the SCRS was cancelled in 2003, that the cats cannot be returned unless the town council has given a letter to the caregiver to redeem the cats so to speak.
This is very odd as caregivers used to be allowed to take cats out as well but with microchips inserted and they had to promise not to return the cats to the streets. CWS bought microchips and left them there in fact for this very reason so that caregivers would be able to reclaim their cats.
I'm writing to them again to enquire about this.