It's for a folding ladder, so attaches to the sides.
I've seen it called a butterfly hinge, but that doesn't seem to return many results at screwfix/toolstation/usual suspects.
Screwfix and the like often have a fairly limited ironmongery selection IME.
Try ringing a local ironmonger - the more varied stuff I do, the more I realise that Screwfix is very handy, but only covers the bases in a fairly general way.
Is there a generic name for this type of hinge?
It's for a folding ladder, so attaches to the sides.
I've seen it called a butterfly hinge, but that doesn't seem to return many results at screwfix/toolstation/usual suspects.