We do need a UK-based phone number for landlords and tenants that book viewings.
Landlords need a UK-based number since they need to be situated in the UK in order to show tenants around the property and manage the property once a tenant is found.
Tenants need to be in the UK to attend viewings and, of course, live in the property. So they will need a verified UK phone number to book a viewing or use Rent Now.
Tenants do not need a UK phone number to ask the landlord a question by pressing the blue ''Message Landlord'' button.