Isle of Wight
Commuter Tube

Some say this is an Isle of Wight metro. Do you think they're wight?

It seems that this is not a subway, but the 8.5 mile electric line does use unwanted London tube cars due to the line'snarrow tunnels and bridges. And though there are no stations in tunnel, the above tunnel runs under the city . Another unusual feature of the line is its terminus at the end of a pier.

There is currently a proposal called Wight Rail, which includes the above rail stretch.
Is the Isle of Wight on the Wight Track? (from LRTA web site, May 1998) 

Another plan calls for extending the line under the sea into Portsmouth, where it would integrate with Portsmouths light rail system, once under construction.
The Stagecoach Island Line unofficial home page
Island Line
official home page