Acknowledgements

This free course was written by Robert Moore (tutor at The Open University). Contributions were made by Moyra Riseborough (Chair of the Workers Educational Association North-East region) and Roger Merritt (Senior Consultant at the National Extension College).

Except for third party materials and otherwise stated in the acknowledgements section, this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] .

Every effort has been made to contact copyright owners. If any have been inadvertently overlooked, the publishers will be pleased to make the necessary arrangements at the first opportunity.