On Wednesday, November 9, 2016 at 7:10:56 PM UTC, Roland Perry wrote:
In message , at 18:55:42 on Wed, 9 Nov 2016,
" remarked:

Almost certain speed,

RAIB have dropped a huge hint about that.

driver or leaf fall?

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Is there not some sort of ATP or speed control system in such an event
on the Tramlink? IIRC, there are timed signals along the line.

TPWS-for-trams, anyone?
--
Roland Perry

The latest from the BBC is that it was a Wimbledon-bound train that derailed after taking a 12mph corner too fast. Explains why the driver has been arrested on suspicion of manslaughter. They are also investigating if he was asleep. Apparently trams aren't fitted with devices to apply the brakes if travelling too fast.

Neill