If you use the maisonette address , does it show ( on the checker ) an ONT exists or not , if the basement shows an ONT , that doesn’t actually exist ( because it’s actually in the maisonette ) then presumably the maisonette will show that FTTP can be ordered but an ONT doesn’t exist , or does the maisonette and basement both show ONT existing , even though the basement doesn’t have an ONT .
Obviously if ordering a second service for an address that has an ONT , a poorly trained ISP may incorrectly raise an order to takeover service rather than supplying a new service, it’s important to make sure of these details, in fact on another forum , a customer with two FTTP services wanted to know how to ensure the correct one was migrated to a new provider ( it’s by using the serial number of the ONT , if two ONTs exist )
FWIW , there is nothing stopping an address having two ( or more ) Openreach FTTP services , provided the network has capacity for it , there isn’t a blanket ‘ban’ saying an address that has FTTP cannot have a second service, obviously in some cases someone may have a business connection, paid for by work , and a residential service they pay for themselves
