We are committed to making our website as accessible as possible to the widest number of people.

Browser accessibility

This site has been built using code compliant with W3C standards for HTML and CSS and can be displayed correctly in current browsers – IE8+, Google Chrome and Firefox. If you’re using an old browser and the website appears broken, we recommend updating your browser. You can change how web pages are displayed in your preferred browser.


We have used images throughout this website to add interest, provide variety and help explain concepts. These images have been kept as small as possible so pages load quickly.

Useful downloads

Adobe Acrobat PDF - Some of the pages on this website have been created in Adobe Acrobat PDF (Portable Format Document) format. To view these documents you will need to download Acrobat Reader. You can get this from Adobe's website.

Contact us

We are continually seeking out solutions that will bring all areas of the site up to the same level of overall web accessibility. However, in case you encounter technical issues or you experience any difficulty in accessing our website, please do not hesitate to contact us.