Yup that's him. Yeah sure pm away lol.
It's not hard they'll guide you through and keep you on the right track. It's nothing to worry about.
Sorry, no I'm not a plasterer.
Evidence- photos, lots of photos doing different things. Mixing, pouring, opening bags, using a mixer, roughcasting, skimming, topcoat, rendering, putting beads on, cleaning up basically the more photos the better and videos if he can, especially using hawk and trowel. References off customers or site agents, friends, bosses (previous bosses and current) also anything that's closely related to plastering-Ames taping for example as well as coving and cornice work.