Sorry I'm late, I missed my train watching TV.

TFL: "Oxford Circus, Bond Street, Victoria, Kings Cross, Piccadilly Circus and Tottenham Court Road Tube stations are likely to be among the first in the capital to be installed with new digital advertising screens."

This seems to go along the line of thinking that anything can be made better by putting a screen in it. This is of course flawed because anything can actually be made better by putting a clock in it. Unless it already has a clock in it, or indeed is a clock, in which case I can't help you.