mnn I remember SSE was pestering people frequently.
I sent a temp letter which I downloaded from https://stopsmartmeters.org.uk/dont-smart-meter-me-notice-of-non-consent-for-smart-meter-installation/
Your rights here. https://stopsmartmeters.org.uk/dont-smart-meter-me-notice-of-non-consent-for-smart-meter-installation/
Everyone has a different set-up of meter but if you can, I would paint the box containing it, not the actual meter, with black metalic anti-EMF paint and leave it at that. If utility company complains that it's not sending signals, tell them that they should revert back to the traditional meter. lol