Certainly has all the characteristics of a Daphnis nerii cat.
As an addition, here is a bad pic of the pupa, which my gardener found today. I put the measure next to it so you can see that it is not just the cat which is huge!
Les - the pupa looks scorched, the pupae I've seen of this species have never been that dark - is it still active (does it wriggle?) - if not, then I'd suggest it may be parasitized.
Hi Roger, yes it is still wriggling, a lot! If it is parasitised, I have two more last instar cats due to pupate any day now. (Rescued from my Oleander bush before my gardeners sprayed the garden due to termite infestation)