Monzo
Monzo’s tone of voice guidelines are brilliant 👌
What I like about them:
Their voice is unique (especially for the sector they work in).
The doc starts by explaining what tone of voice is and why it’s so important (establishing why readers should care).
The guidelines are broken down into a summary followed by an in-depth look at each principle (this is great for non-writers who still need to be aware of the tone).
The explanations of how to make each part of the voice happen are easy to follow and put into action.
There are examples of what good looks like and what not to do.