Body language expert Inbaal Honigman reckons it is in fact Bake Off host Noel Fielding.
Sharing her findings with the Daily Star, she explained: “The Witch’s enormous boots suggest most likely masculine feet – and the hunched walk shows commitment. This is someone who’s happy to remain in character for a long time.
“Never looking at the TV cameras (which is harder than you’d think), this person is likely a pro around TV sets.”
The expert continued: “We can see the Witch nods as she talks, not just saying her lines, so this must be someone who knows a thing or two about delivering convincing monologues.”
The act began with the witch appearing on stage, stomping down the steps and handing out apples to each of the judges in turn.
When it came to Amanda the witch held her wrist and one hand and a gnarled stick in the other.
They cackled: “Do you know why they say beauty’s only skin deep? Because we’re all rotten to the core.”
A third hand then shot out of the witch’s black cloak and grabbed the apple in Amanda’s palm.
video