When are your offices and service access points open? The locations, contact details and opening times of WDH offices and service access points. For details about our opening times and contact details please visit our Contact us page. Closures around public holidays will be displayed on the home page of this website. If all our offices are closed, you can access information and services by registering for an online account or you can contact OneCALL 0345 8 507 507 open all day, every day. Keywords address ; service access point; SAP ; office ; opening