You should tell your tenant(s) to visit our website and complete our moving home form. Ideally they'll need to get in touch to let us know at least 10 days before they move out.
Our moving home form can be found at the bottom of our moving home page - https://www.watkinsenergy.co.uk/movinghome/index.html
Alternatively you can contact our Customer Care Team on their behalf to let us know and they'll advise you how to proceed. Our cantact details can be found here https://www.watkinsenergy.co.uk/index.html#contact