Bolt snapped inside camshaft

[GLG]

The intake side does not have the cam sensor reluctor ring to bolt on there, so if it were me, I would leave it in there and drive the car like normal. I would keep trying here and there to dislodge it. Have you tried using a nail set on an angle with a hammer to try to back the broken end out? Also, maybe the engine vibration and heat will loosen it up. Maybe spray a bit of penetrating oil in there.