Date, foodplant, place and length (measured on mm graph paper - guesses often mislead) would help narrow the search for larval queries.
My suggestions are
1. Possibly Scarce umber if found April- June, but I'm very uncertain. The posterior is wrong for Scalloped oak.
2. Probably Scarce umber if found April-June on one of its foodplants. Not Feathered thorn, as it should have a pair of conical warts (usually orange) on posterior segment. (the orange point in your photo is tip of leaf behind the larva).
3. If found mid April-mid June I'm pretty sure it is the Dun bar as it has black pinacula (small round warts with setae growing from them) and only a few macro moth larvae have black pinacula. Hebrew character does not have black pinacula. Dun bar eats other larvae, so rear each one separately.
ukleps website has a more complete series of different macro larval instars than ukmoths, though the latter is better for micro larvae. Porter only shows 1 or 2 of the five instars for each sp.
Rearing what you photograph is the surest way to get id.