The following websites provide useful news, reference, communication and marketing data

Providers of Research and Marketing Data. Used by Government and Suppliers to facilitate communication and marketing. Oscar has an extensive database of Public Sector organisations and contacts as well as offering bespoke research and data services to clients.
Free news and data resource for everyone working in the UK Public Services. Low cost supplier subscription which provides exposure of companies products and services, tender alerts and an open platform for news, case studies and thought leadership.
Map based view of all Public Service organisation in the UK. From Government Department and Local Authorities to Parish Councils and Libraries. Selectable by various types and administrative and political areas. Due to be launched Autumn 2016