wrote in message
...

Is it possible to hear London Underground radio transmissions on a regular
scanner now?

No, they now use a version of digitally encrypted Tetra

Google Tetra TFL

Steve Terry
--
"I would like to plead for my right to investigate natural phenomena
without having guns pointed at me.
I also ask for the right to be wrong without being hanged for it."
- Wilhelm Reich, November 1947