Copyright

This is a non-profit educational website, provided as a public service. Visual and auditory source material (pictures and sound to you) have been included on this website to illustrate topics that might benefit from such support. In a work about audio-visual media it would seem simply perverse not to do so.
There is no intention to infringe or violate any copyright. Sources have been identified wherever possible. When appropriate this may also indicate the copyright holder. Use of copyright material is made under UK law according to the fair use provisions of the Copyright Act 1989. We apologise for any omissions. Should unidentified copyright holders contact us we would be happy to make an appropriate amendment.

Comments and proposed corrections are most welcome.

Data is collected about the volume of access to each page of the site but no information is retained about individual visitors nor is any information passed on to third parties.
We use third-party advertising companies to serve ads when you visit this website. These companies may use information (not including your name, address, e-mail address or telephone number) about your visits to this and other websites in order to provide advertisements about goods and services of interest to you. Google uses DoubleClick DART cookies from which you may opt out by visiting the Google ad and content network privacy policy. If you would like more general information about internet advertising and would like to know your options in relation to not having this information used by these companies, click here.
Terra Media accepts no responsibility for the content of other websites to which links may be provided.