In message , Nick Cooper
writes
Exteriors were shot at "Moorgate," but the station name is not visible,
although it was (presumably erroneously) on the SPFX model of the same;
the interior studio sets have LU roundels with a name starting with
"TRAF..." which could only be "Tragalgar Square" i.e. the Bakerloo part
of the current "Charing Cross." This makes perfect sense in the
context of it leading to the secret bunker under
Whitehall:

In the later novelisation of Invasion of the Dinosaurs, the station in
question is Westminster.
--
Ian Jelf, MITG
Birmingham, UK

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