On 13 July, 12:29, wrote:
Why are train building and railway infrastructure companies constantly trying
to re-invent the wheel? Why don't they just use one of the systems running
happily on the central line or DLR for gods sake or has Not Invented Here
Syndrome raised its ugly head again?

It is the system from the DLR.

I don't know anything beyond what's in the board papers, which have
variously mentioned communication problems and specifically "works to
replace the
concentric cable with newly installed multi-core cable", which I think
refers to the leaky feeder cable that runs along the track and tells
the train where it is.

U