Not sure if the screenshots I've attached from streetview show this clearly enough, but the downpipe to the right of my terraced house goes through the roof and discharges into another pipe cased in concrete, which runs alongside my path and empties into a dished channel on the pavement. I'm replacing the old guttering and downpipe and was wondering if I could just have it discharging onto the roof above the front door instead? I'm putting on a new roof and there's nothing actually under the roof at that point. I've got to dig up and replace my front path, so that pipe/concrete thing would need replacing and I'm not sure what to replace it with. It would be so much easier to just do away with it all together. Any reason why not?