Best answer by Tim_OVO
Tried your suggestion of pressing button 9 and I get a screen saying "night" then a screen saying "day" then the screen you said about with a seven digit number before the decimal points... Is it possible they've changed the software for the Liberty 110 so the wording is different?
We've figured this out
It sounds like you have a 'Liberty 110' smart meter, designed to work with appliances like storage heaters and underfloor heating. To get the Night and Day reading on a 'Liberty 110' smart meter, press 9 on the meter's keypad.
It's only with the standard 'Liberty 100' smart meter that you need to press 6 if it's Economy 7 (for Day and Night readings) and 9 to get the single rate reading.