It's clear to me that, much like the guidelines for pregnant women, the government

[Monty92]

But surely the point is that you need to give yourself a long enough period of social distancing to ensure you don't develop symptoms before you can then be reasonably sure you're not carriers?

Of course. My plan is to ensure we are all (me, the missus, the kids and my dad) virtually house-bound for 7-14 days and providing none of us have symptoms I'll green light him to pack his bags and drive down for a few weeks.