Awful People by Julie Burchill and Daniel Raven.

When a pair of middle-aged, middle-class ex-spouses get back together to write a rap musical, the stage is set for eye-watering embarrassment and folly. As they waylay the less privileged young people who cross their path - their Ukrainian nanny/cleaner (*home curator*) and a young black Deliveroo man - it's soon clear that this clash of cultures can only end in calamity.