Binatone two wireless telephone set (Heysham LA3)

Binatone landline wireless black telephone set. It has one base station with phone and one remote station with phone, both working, with mains plugs for charging. Plus one non-working remote phone (probably battery gone). We have stopped using them as we have gone full fibre with no landline connection. It would be suitable to replace a single plug-in BT landline style phone.