Cookie policy & preferences

This website uses essential technologies for operation, security and remembering your choices. Google Analytics is used only after Statistics consent; OpenAI advertising measurement requires both Statistics and Marketing consent. Read our Privacy Policy for how we handle enquiries and other personal information.

OpenAI advertising measurement

OpenAI measurement helps us understand whether ChatGPT advertising leads to an enquiry. Our setup requires both Statistics and Marketing consent. The pixel may use automatic matching of browser-hashed contact details with enquiry events; see the Privacy Policy for details.

  • __oppref — OpenAI, advertising measurement: stores an ad-click reference; up to 30 days after it is written. A new capture of the click reference resets this period.
  • __obref — OpenAI, advertising measurement: stores a browser reference for matching events; up to 365 days after creation.

Withdrawing either required category stops future OpenAI event measurement and instructs the pixel to remove these cookies. GPC and Do Not Track signals also block this measurement. Browser restrictions can shorten cookie lifetimes. Cookie expiry does not determine how long previously sent events or enquiry records are retained. You can submit the contact form with optional cookies off.