Question: The down pipe outside our house drains into our neighbour's drain and from there through a pipe under the garden and pavement to the road. They have asked us to have our down pipe re-directed to our own garden. We would then need it extended to run along the surface of the garden and finally connected to the channel that runs under the pavement. This will involve some digging down in our garden to find the entrance to that channel and a further right angle connection to get the extended pipe connected to it . I have no idea which trade we should approach to quote for this work.