We've a downstairs cloakroom where the entrance door is along the long side of a rectangle. The outside walls are one on the outside wall and the other on an inner.
The loo backs onto the outside wall and was originally without a wash basin. We had one put in on the opposite short wall but this means its waste pipe runs along the inner wall opposite the door.
One of these 'Combined Two-In-One Wash Basin & Toilet' was suggested by a plumber. Does anyone have one? It would be a much tidier solution to the downstairs loo.