And the head-
All I've got to do is fix it now!
I'll give the head to a machine shop I've used in the past and ask them if it should be skimmed. Also, two glow plugs wouldn't undo so left them in place and will have another go now the head's off. I can spray lube from both sides now! The block, I will clean up as well as possible and hope there's no damage to the liner/ bore where the gasses have been leaking.