Geo Networks have linked up another customer from Enfield to Docklands using their impressive fibre system which uses London’s Victorian sewage system. According to Thames Water this allegedly measures some 67,000 miles in total.
Whilst this sounds incredulous the London Subterranea graphic can be explored in much more detail at source and you begin to grasp the enormity of that network.
Computer Weekly have some underground shots which are worth viewing.
It’s a bit dated (2008) but Geo’s video explains all!