For some reason, they don't like to put Maple Leafs on ceremonials, so they needed to figure out a way to distinguish MCpl from Cpl. They have tried to justify by saying that a MCpl now does the job that a Cpl and a Cpl does the job that a LCpl used to, which isn't actually the case. If they were going to do that it should be MCpl wear one, Sgt wear two, WO wear three, CQ's wear three with the Crown, MWO's wear just the crown, RQMS wears the crown with wreath, and RSM is unchanged, although they should probably be wearing the British version of the Royal Arms if we are going down this road.
Well, best course of action may be to consult with the RSM. If others in your unit already wear patrols, then there "should" be some sort of direction that has already been provided on proper wear, such as in Regimental Standing Orders.