jonmorris wrote:

I reported everything by telephone to British Transport Police, and
await an explanation from FCC. BTP were concerned by this, but I'm
not holding out much hope of them getting to the bottom of things. I
don't know who the people were who claimed to be working for the
railway, and never got to speak to the driver.

http://www.documentcapture.co.uk/forms/btp_2006.htm

BTP are running a survey about crime on the railway. You should forward
your observations.