Scenario one
The founder with a busy home office
Chelsea. Two adults, two children under twelve, one dog, one very used study.
Daniel runs a company from a converted room on the second floor. Draft board papers, investor materials, legal correspondence and personal messages all pass through the same laptop, which sits on the same Wi-Fi network as the children's tablets, a games console and a smart television that nobody has updated since it was delivered.
Nothing has gone wrong. That is precisely why nobody has looked at it. His concern is not dramatic: he simply does not want a confidential draft sitting in a public AI tool, and he does not want a compromise on a child's device to become a problem for the company.

What the work involved
- A separate network zone for work devices, distinct from family, guests and smart-home equipment.
- A local AI system in the study cupboard, used for summarising drafts and preparing questions without sending them to a public service.
- A short written rule for the household on which tool is used for which kind of document.
- A password manager for both adults, with the company accounts protected by a second login step.
- An agreed plan for the laptop being lost or stolen while travelling.
Outcome
Daniel can draft candidly at home. The children's devices remain the children's business. Neither situation depends on him remembering to be careful.