The fastest way to reach us is by email. We read everything, although replies can take a few days when things are busy.
Spotted an out-of-date tax band, a stale tariff figure, or a calculation that doesn't look right? Tell us which page you were on and what you expected to see, and we'll check it.
Most of the calculator's features started as user suggestions, including the charging mix sliders and the dark mode. If there's something the tool doesn't do that you think it should, we'd genuinely like to hear it.
For anything relating to privacy, cookies or data protection, see the privacy policy and legal page first; the same email address handles formal requests.