Acknowledgements

The content acknowledged below is Proprietary (see terms and conditions) and is used under licence (not subject to Creative Commons licence).

The material acknowledged below is Proprietary and used under licence (not subject to Creative Commons licence). See terms and conditions.

Grateful acknowledgement is made to the following:

This course was originally written by Frank Banks and the sections updated by:

Course image: Martin Weller in Flickr made available under Creative Commons Attribution-ShareAlike 2.0 Licence.

Section 1: Andy Lane

Section 2: Jonathan Darby

Section 3: Non Scantlebury

Section 4: Bernadette Atwell

Section 5: Tim Seal

Section 6: Richard Windle

Section 7: Patrick McAndrew

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

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