John Grefe, 204 Green End Road, Cambridge, CB41RL

Functional
These cookies are required for basic site functionality and are therefore always enabled. These include cookies that allow you to be remembered as you explore the site within a single session or, if you request, from session to session as well as assisting in security issues and conforming to regulations.

Performance
These cookies allow us to improve the site’s functionality by tracking usage on this website. In some cases these cookies improve the speed with which we can process your request, allow us to remember site preferences you’ve selected. De-selecting these cookies may result in poorly-tailored recommendations and slow site performance.

Social Media and Advertising
Social media cookies offer the possibility to connect you to your social networks and share content from our website through social media. Advertising cookies (of third parties) collect information to help better tailor advertising to your interests, both within and beyond our websites. In some cases, these cookies involve the processing of your personal data. For more information about this processing of personal data, check our Privacy Policy & Cookie Policy. De-selecting these cookies may result in seeing advertising that is not as relevant to you or you not being able to link effectively with Facebook, Twitter, or other social networks and/or not allowing you to share content on social media. You can always change your preferences by visiting the "Cookie Settings" at the bottom of the page.