I want Diane Abbot in a magnificent butterfly outfit, flitting here there and everywhere (but never taken seriously). She'll get to sing a lovely solo (sad) song about getting no RESPECT.
We need a Greek chorus of Mark Carney/head of IMF/Barak Obama/others, making doomsday style droning chants in austere robes, at start of each Act.
Ken Clarke needs to stand at the sides, chuckling loudly & bizarrely at inappropriate moments: crazy mad old guy in the corner smoking a cigar, watching it all.
Nigel Farage can hop around in a frog costume in a misty swamp, ranting excitedly about the establishment elite and immigrants, smiled fondly at by other swamp creatures getting uproariously drunk ( Arron Banks, Nigel Lawson, Lord Lamont, Michael Caine, John Cleese, Dyson, T-Martin). They keep throwing coins at Farage.
Philip Hammond wears an invisibility cloak.
Dominic Raab & David Davis can have an excited duet about how surprising it is that France is so close to Britain! This can end with a shower of shredded paper on DR & DD who sing a final set of lyrics about "Who knew that it would be so complicated and involve so much paperwork?"
I really would like Sabine Weyand in there, somehow. As a completely different dramatic production, SW as Velma, Donald Tusk as Shaggy, Juncker as Scooby transformed into a fang bearing watchdog, Merkel as Daphne (but keep the purple outfit, for sure) and Macron as Fred. Not sure about the plot, but definitely ends with apparent TMay being unmasked to actually be JRM unmasked again to actually be VPutin. With accomplice = David Davis, who gets to exclaim the immortal lines "And my evil plans would have worked out, too, if it weren't for those meddling EU negotiators!"