In article , Recliner
writes
Do you know how Chiltern trains will be adapted for the new Met signalling,
or will conventional signals and tripcocks be retained for them?

I've answered that elsewhe the control centre will generate movement
authorities for Chiltern trains just like ones for Met trains. These
will then be used to cause the coloured lights to show red, yellow, and
green as appropriate, rather than the blue that a Met train will see and
which means the cab signalling is in charge.

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Clive D.W. Feather