Even more time consuming on an Agile tariff. My SMETS2 meter has been configured 30 minutes outFortunately, with all such billing issues, it is always possible to go back to basics as the data over the start reading and end reading of a meter is always there so that the total kWh drawn is always known and capable of being billed. And as long as the split of day/night readings is also there it will always be possible to reconstruct a correct invoice. Then the new calculated cost, and payments made, can be used to produce a net debit or credit position. It's just a slow manual process.