We have a SMETS 1 meter and I thought this would be an issue, but it seems that some can be upgraded by downloading a software patch as Octopus get a meter reading every 30 mins.Same rates I guess, they don't offer tailored quotes.
Important point however is to ensure you have a compatible SMETS2 meter as most SMETS1 are incompatible with EV tariffs and providers are very reluctant to upgrade them..