@Patc Two ways to get a meter reading, one is from your Display unit, the other is from the actual meters. The meters will probably need one of their buttons to be pressed first, if you have a number pad press 9.
I have moved home in November and give them my final metre readings then and paid that charge in December. Now they are charging me x2 as much for December until I send them the metre readings but I do not live there anymore???