I've just moved to Scottish Power (& am in Scotland). There doesn't seem to be an email address I can see to send details.  I've tried calling, but as happens with so many things, I'm asleep before the call is answered (presuming it is answered).  I've logged into their site, but there doesn't seem to be a message option.  I know my gas reading from memory now, as I'd stopped using it until they got things sorted out. Here's the text of my email, as it saves further explanation.  I