I wouldn't be surprised if the font is unique to the London Underground.
At least the first display's font is fairly distinct, I haven't noticed it elsewhere. The bottom of the capital letters is a pixel lower than the lowercase letters.
Looks pretty similar to the font used on the Tyne and Wear Metro[0], though I have heard the metro's signage is made up of hand-me-downs from the tube anyway.
At least the first display's font is fairly distinct, I haven't noticed it elsewhere. The bottom of the capital letters is a pixel lower than the lowercase letters.
Printed signs from Transport for London use Johnston Sans, noticeable with the diamond-shape dots on "i" and "j": https://en.wikipedia.org/wiki/Johnston_(typeface)