[jadavies]

It was, as well as the Automatic Train Protection (ATP) and Automatic Train Operation (ATO) systems. I worked on part of the track to train comms system of the subsequent Victoria Line upgrade which was also written in Ada.

I forget which compiler was used, all I remember is that it cost an arm and a leg!

[randomsearch]

That's great, Ada is such a fantastic language and I'm delighted and reassured to hear it's running those systems!