If a guest informs you they have tested positive COVID-19 or they have symptoms of COVID-19, they should return home if they reasonably can. You should discuss with the guest if you need to change their booking in order for them to travel home, or whether they can stay in your accommodation facility to self-isolate.
While they are waiting to travel, or if they self-isolate at your guest accommodation facility, they should follow government guidance on dealing with possible or confirmed coronavirus (COVID-19) infection.
Accommodation providers should take all reasonable steps to encourage guests to adhere to government restrictions, including informing guests of restrictions when taking bookings. It is also good practice for accommodation providers to ensure individuals are aware of their legal obligations to self-isolate. However, it is not your responsibility to check guests’ test results or enforce self-isolation rules; enforcement of the law remains a matter for the police.