Article 4(1) Directions - GPDO 1995 - Public forum - Planning Advisory Service (PAS)

I'm currently looking at removing PD rights for all sections within Schedule 2 of the GPDO, through an Article 4(1) direction, for SSSIs and County Wildilfe Sites within our district. Does anybody have any experience of Article 4(1) directions, and specifically to do with sites such as SSSIs and CWS? many thanks James