In article ,
Tom Anderson writes
I'll guess Moorgate; the term 'Moorgate control' is now used in describing
some sort of fail-safe signalling thingummajig,

Timed train-stops to ensure a train speed is reduced.

so you might expect it to
be in the dictionary.

No, it's railway jargon. I wouldn't expect "Welwyn Control", or the
railway use of "in advance", to be there either.

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