> In article
> <1e535867-7639-4c08-9e49-f0fdb2655...@u72g2000hsf.googlegroups.com>,
> jonmorris gmail.com> writes
>

>>On FCC, I suspect a lot of people going in/out of the new gates at
>>King's Cross have travelcards, but may have come in from a lot further
>>out. I also suspect that they will buy a ticket from their origin
>>station to the next one along, to get through the gates/manual check
>>at that station.

>
> Known in LU terms as a "dumb-bell". The gates are capable of spotting
> this; given an A-B-C-D journey, the A-B ticket will record lots of use
> at A but none at B, and similarly for the C-D one. The gates *can* be
> programmed to quietly alert the staff so they can watch the person.
>