‘The ad libs had us shaking behind the camera’: Corbyn and McKellen cameos raise panto’s profile

Star turns are boosting ticket sales this season, including Islington show featuring MP's Wizard of Oz and Olivier winner's Toto

We're a third of the way through the fabulously camp production of Wicked Witches, a mashup of Wicked and The Wizard of Oz, at the Pleasance theatre in Islington, north London. Dor (formerly known as Dorothy) and Tin 2.0 need guidance on how to take down the Wicked Witch and save the borough of Oz-lington from a great blizzard.

But wait! Who's that Facetiming? It's only Jeremy Corbyn, the wise Wizard of Oz-lington! The 200-person audience cheers and applauds the Islington North MP, who looks as if he's beaming in from the allotment.