Thanks for all the advice. I managed to clear out the other stables so I have brought all the ewes in, this way they have over 3(squared metres) of space each. This way I can just go and do them all at once, it is closer to lights, water, food, hay, straw and the house. Plus it one shed has lights built in and the other has rechargeable LED work lights that I use. Brought them in today instead of tomorrow as It looked like it was going to rain.
Does anybody have ay experience using the wax stick markers to number lambs or does it not work well, I have found spray doesn't stay on well?