The NHS and care homes in the UK are sourcing accommodation as required. This will be arranged directly between the care provider and the accommodation provider. It will not be dealt with through AirBnB.
To be honest @Trevor243 I think it is being done through various channels, both directly but also through partnerships nationally like the one Airbnb has set up with the NHS.
There will be an ongoing need for key workers to find accommodation.
@Helen3I haven't seen anything official from either the NHS or AirBnB to verify that they are working together to arrange accomodation for key workers.