"Adrian C" wrote in message
...
In the past, there has been discussion about allowing mobile phone
operators to install base stations below ground and provide some coverage
for folks on trains. This is yet to happen?

I was on a tube train today and was thinking sod that...

What we really need is internet wireless hotspots on each train, connected
to the rest of the world via the train wheels? Could the use of Power Line
Technology (as done in the home with those plug-in mains ethernet
adaptors) help here?

The problem is that even if it did work there would be no-one to pay for it.

Whatever system is implemented it has to be one which charges for use,
otherwise no-one is going to make the investment in installing it

tim