I wouldn't recommend turning the engine over via the cam pulley, I know it's tempting but a colleague of mine did it to set the timing and managed to get the timing to slip a few teeth and caught a few valves/pistons. And I know it's a non interference engine but I still wouldn't recommend it. I would have said try bump starting it, with some help obviously and 2nd gear, if it starts it's obviously not seized and there's a starter issue, either wiring (as you mentioned with the loom) or the starter it's self has packed up.