• Strictly necessary Always active

  Keeps you signed in, remembers what is in your basket, and protects the checkout. The site cannot work without these, so they are not optional and are never used for advertising.

• Functional

  Remembers choices you make — such as your region, language, or a saved comparison — so the site behaves the way you left it. Switching this off does not stop the site working, only remembering.

• Analytics

  Measures how the site is used — which pages are visited, where visits come from, where checkout goes wrong — so it can be improved. Reported in aggregate, never used to build an advertising profile of you.

• Advertising and sharing

  Lets advertising partners recognise this browser so ads can be measured and targeted across other sites. Under California law this counts as selling or sharing your personal information; switching it off opts you out.

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