As there wasn't previous a Southampton thread, it makes sense... keeps everything in one place, where it is most relevent. Don't be too hard on the admin, they have a hard enough job with the number of posts on here. Yes, it is relevent to BOH too, but not so much...
As for the SOU runway, I believe the main problems there are simply surrounding a) the boundaries of the airport and the fact that the motorway is to the south as everyone knows, and that the railway yards to the north are still in use (The Alsthom site that was closed is not the yard closest to the airport) and b) the airport has strict controls placed upon it by the local council and one of those is, I believe, that the airport cannot extend the runway at the present time, without renegotiating the Agreement.
FF