These are the cookies required for the operation of our website. They include, for example, cookies that enable you to log into secure areas of our website, making use of e-billing services.

They allow us to recognise and count the number of visitors and to see how visitors move around our website when they are using it. This helps us to improve the way our website works, for example, by ensuring that users are finding what they are looking for easily.

They are used to recognise you when you return to our website. This enables us to personalise our content for you, greet you by name and remember your preferences (for example, your customer reference number or choice of language).