Acknowledgements

Cover image: reynermedia [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] in Flickr made available under Creative Commons Attribution-NonCommercial-ShareAlike 2.0 Licence.

The material acknowledged below is Proprietary, used under licence and not subject to Creative Commons licensing (see terms and conditions). Grateful acknowledgement is made to the following:

Figure 2 © Ian Hodgson/Reuters/Popperfoto

Figure 3 © PA Photos

Figure 4 © Accent Alaska

Figure 5 © Tony Bennets/Lonely Planet Images

Figure 6 © Bryan & Cherry Alexander Photography

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