Will my MP appreciate being addressed 'Hey MP'?
Hey-MP is the name of our online tool that helps connect voters with MPs. Though we use the 'Hey MP' language in less formal settings (like social media and our own campaign emails), all formal templates in the system (like emails to MPs) address MPs 'Dear...' and we have tried to take account of any Drs, Sirs, etc. We are in regular contact with MPs from all parties and have used our extensive experience and knowledge of both political engagement and social media to make sure we are hitting the right balance.
Additionally, all of the templates in our system are editable by users before they send. Because HeyMP does not send anything on anyone's behalf, all it does is open your own email account (or Twitter, Whatsapp, Facebook accounts) and fill in the text, it is up to each person to review that text and change it as they see fit before deciding to click send.