ahmed_mulla SMETS2 meters all report their data to the Data Communications Company (DCC). SMETS1 meters reported their data to whoever installed them had a contract with, and that caused a mess; hence SMETS2. The good news is that some SMETS1 meters are being brought within the DCC domain as time goes on although some may never be able to be adopted.
Both SMETS 1 and 2 have the capability of reporting every 30 minutes and those that are within the DCC domain do report every 30 minutes. It's your choice whether to allow your energy supplier to receive 30 minute readings, or not. If you want a time of use tariff, then evidently you need either a SMETS2 meter, or a SMETS1 meter that has been adopted into the DCC system. Then the energy supplier needs to connect to your data in the DCC database and confirm that they can receive 30 minute readings for your ToU tariff. Ironically, my SMETS1 meter displays import and export totals but cannot display Time of Use sub-totals. However, as the meter is sending 30 minute data to DCC, we are on a ToU tariff. To be able to find out our consumption, I have to download the same 30 minute data from DCC, but at least it means I can keep an eye on actual (ie billable) usage.