Increase your privacy - remove yourself from the electorial register marketing list
The government sells an edited version of the Electorial register for sales and marketing purposes. Every year they send out a form to update your details. That form should always have an option to opt out of your details being sold to companies like 192.com.
If you want to opt out before the next update form is sent out then resubmit you form. Here is a link to the the form.