And in a throwaway comment in an article today in The Scotsman it becomes a bit clearer:
Figures set to be presented to the city's tram sub-committee next week show that contractor Carillion moved 40,000 metres of pipes and ducts when it was originally due to be paid £40 million to divert just 27,000m.While I'm sceptical about the second sentence there, I'm shocked that there was 50% more "stuff" down there than was expected. Was this because the utility companies had no idea what was actually down there? Was there just insufficient due diligence performed when calculating the amount of work to be done? I'd love to know who fucked up on this one - and whether it was actually avoidable.
According to the council, the amount of utilities work carried out has led to a "significant" improvement in the quality of the city's infrastructure and should help provide faster broadband internet.