That's clear the wool off the board
after each sheep.If any of the sheep need dagging, that's your job, before the shearer comes. Cutting dirty wool blunts their clippers.
Being Herdwicks you probably aren't planning on selling the fleeces? So no need to tell you about skirting and rolling, and how to store for crafters, etc.
Have spare hurdles handy. Without seeing the shearer's rig we can't advise on the specific layout of pens you'll need. But as said above, have them ready penned in a small area : the less room they have to move, the harder it is for them to jump out

.
Try to keep them and yourself calm; agitated sheep are much harder to handle - for the shearer and for you.
The shearer is vastly experienced and will take it all in his or her stride, so listen to what they tell you and don't worry.
