Catepillar ID

Hi, anybody able to help identify this fella, he was in one of the toys in the kids sandpit. Not moving much so not sure if he was about to undergo metaphorphise. Would like to keep him if so, but need to know his foodstuff if he's not ready
EDIT: sorry forgot to say he's only about 2.5cm long, and looks a bit hawkmothy to me
EDIT: sorry forgot to say he's only about 2.5cm long, and looks a bit hawkmothy to me

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Sorry I think this is an Elephant Hawk moth caterpillar.
Good info here for food advice and you can click on all the photos to enlarge.
https://ukmoths.org.uk/species/deilephila-elpenor/larva-5/
https://ukmoths.org.uk/species/deilephila-elpenor/
oops sorry edit forgot to put the root link of Moth with the other photos ones.