The Creators of this site recognise and acknowledge all ownership rights & copyright to the material included and have, wherever possible acknowledged the source.

Wherever possible we have sought out the owners of material and gained permissions to use it here. For this we thank them.

In other cases it has not been possible to trace ownership or contact original authors particular for some materials in the public domain.

In such cases if you are the owner or author of this material we ask you to get in contact with us so that we can properly acknowledge you work. If you object to the inclusion of material in this display please notify us and  it will be removed.

Similarly if any material causes offence please contact us.

The support and input of a large number of people who helped create this display is very much appreciated. We have tried to include as many as possible but please let us know if we missed you out.

In particular, we would like to acknowledge data from.

(Please note that the RBC link is to a 15 Mb downloadable pdf file.)