Hi, Just having a conversation which has turned into why GPS, DAB radios and
other stuff doesn't work at all well on the more modern rolling stock i.e.
not picking up a signal. I'm guessing it's got something to do with the
window materials, but just wondered if anyone knew here?

Example train (http://static.flickr.com/2/1408980_241dea4228_o.jpg)

Thanks