Watching the One Show last night and heard this. It made me wonder why.
Personally I view witchcraft as a sort of 'belief system' related to the practice of rituals in an attempt to influence events. Whether you believe there is any truth in this (belief system), or power behind the rituals, does not relate to the fact that there are people who regard themselves as practising witchcraft and thus are witches.
So why say there is no such thing as witches?