Yes. Looks good to me.
The Woolly Alder Sawfly, Eriocampa ovata, exudes waxy fibres in tufts from pores in the skin. After each moult a new coat has to be exuded. The waxy fibres clog the jaws of attacking ants.
A bit tenuous, but I would say so. The scars result from larvae that die before they have fully grown so could be that the larva didn't last long. Successful larvae leave the apple and the apple then falls off whilst still quite small as part of the June drop.
Check fallen apples for ring scars. Telltale sign of the Apple Fruit-borer sawfly, Hoplocampa testudinea.
Another Caliroa slugworm sawfly. Not yet the final instar but I suspect this might be C. cinxia, Yellow-headed Oak Slugworm. Head yellow-brown without a dark band, anal bristles pale and 2nd and 3rd pair thoracic legs dark.
Several of these Caliroa on oak this evening. Dark band across the head above the eyes, 2nd and 3rd pairs of thoracic legs dark and anal bristles pale. Characteristics mean these should be C. annulipes - Ring-footed Slugworm.
Probably more records that aren't on iRecord. Certainly commoner down south. Nice find anyway. 👍
I agree with Rob. Caliroa cinxia.