Required for the website to function. These cover things like logging in, security, shopping baskets and remembering what is in them. They cannot be switched off.

Remember choices you have made, such as your language or region, so the site behaves the way you expect on your next visit.

Help us understand how visitors use the site, which pages are popular and where people run into difficulty, so we can improve it.

Used to show you relevant advertising on this and other websites, and to measure how well those adverts perform.