A deliberately faltering, faux-dramatic start instantly sets the scene for Dreamweavers and neatly encapsulates the chaos ahead. Real-life siblings (and daughters of comedy royalty Ruby Wax and Ed Bye) Maddy and Marina Bye stalk the room, armed with their dream helmet. They claim it can read and bring to life the subconscious escapades of anyone who wears it, although it looks suspiciously like a colander wrapped in fairy lights.

Frequently laughing at their own daftness, the pair’s commitment is constantly charming, and they share an uncommon chemistry that empowers them to improvise with abandon, often deliberately sabotaging one another to the audience’s delight. A few members of the front row are beckoned onto the stage for some light ribbing and it’s a testament to the sisters’ brilliant crowdwork that they join in with reluctant gusto. Dreamweavers is a wonderful, anarchic sketch show from two superb performers, and despite its unruly flow there’s a superb script holding it all together. 

Siblings: Dreamweavers, Pleasance Courtyard, until 24 August, 8.20pm.