Thomas Sanderson Cookie Policy

On the Thomas Sanderson website, cookies record information which allow us to tailor our website to give you the best possible experience and also allow for analysis and understanding of media performance and customers.  By visiting the Thomas Sanderson website, some or all of the cookies listed below will have been added to your device.

A cookie is a small amount of data, which often includes an anonymous unique identifier. Any website can send its own cookie to your browser (if your browser's preferences allow it). You can change your cookie settings at any time. You have the ability to allow all cookies, or receive a notification of when one is issued, or to block cookies all together. if you wish to block or delete cookies you should refer to the guidance provided by your own device/browser. By blocking website cookies please note it may impact on the quality of your experience on the Thomas Sanderson website.

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Cookies information

Strictly necessary cookies are cookies that our website needs to use in order to function and deliver content for the user.


.AspNetCore.Antiforgery.9fXoN5jHCXs - .AspNetCore.Antiforgery.

.AspNetCore.Antiforgery.w5W7x28NAIs - .AspNetCore.Antiforgery.

__RequestVerificationToken - This is an anti-forgery cookie set by web applications built using ASP.NET MVC technologies. It is designed to stop unauthorised posting of content to a website, known as Cross-Site Request Forgery. It holds no information about the user and is destroyed on closing the browser.

_dc_gtm_UA-xxxxxxxx - This cookie is associated with sites using Google Tag Manager to load other scripts and code into a page.  Where it is used it may be regarded as Strictly Necessary as without it, other scripts may not function correctly. The end of the name is a unique number which is also an identifier for an associated Google Analytics account.

ARRAffinity - This cookie is set by websites run on the Windows Azure cloud platform. It is used for load balancing to make sure the visitor page requests are routed to the same server in any browsing session.

ARRAffinitySameSite - Used for Azure Load Balancing between servers/services

ASP.NET_SessionId - General purpose platform session cookie, used by sites written with Microsoft .NET based technologies. Usually used to maintain an anonymised user session by the server.

OptanonAlertBoxClosed - This cookie is set by websites using certain versions of the cookie law compliance solution from OneTrust.  It is set after visitors have seen a cookie information notice and in some cases only when they actively close the notice down.  It enables the website not to show the message more than once to a user.  The cookie has a one year lifespan and contains no personal information.

OptanonConsent - This cookie is set by the cookie compliance solution from OneTrust. It stores information about the categories of cookies the site uses and whether visitors have given or withdrawn consent for the use of each category. This enables site owners to prevent cookies in each category from being set in the users browser, when consent is not given. The cookie has a normal lifespan of one year, so that returning visitors to the site will have their preferences remembered. It contains no information that can identify the site visitor.

SiteID - Azure CDN Cookie used to identify users

SSID - This cookie carries out information about how the end user uses the website and any advertising that the end user may have seen before visiting the said website.

SSOD - Sitespect Cookie - Stores additional Campaign data for the user, including the hit rating value and the baseline Metric hit data.

SSRT - Stores the date and time of the user's last request to determine if the visit has timed out. This cookie is typically updated every 60 seconds, but you can configure the frequency in the SiteSpect Interface. In addition, it stores information about the robot test (does SiteSpect think this person is a robot, how many tries of the robot test have we done).

SSSC - A session-only cookie used to send the user's Campaign assignment information to the backend webserver.

TiPMix - A functional cookie for Azure to assist with routing to the correct server

TS-Samples - This cookie is used so that website users on Thomas Sanderson are able to retrieve their sample basket.

UMB_SESSION - Preserves the visitor's session state across page requests.

x-ms-routing-name - A functional cookie for Azure to assist with routing to the correct server

Our Performance cookies monitor site performance and follow user actions. These cookies do not collect identifiable user information – they obtain data anonymously and only use it to improve the performance of a website.


_fbp - Used by Facebook to deliver a series of advertisement products such as real time bidding from third party advertisers

_gat_UA-2548785-1 – Google Analytics Cookies

_pinterest_referrer – These cookies allow users to share pictures via Pinterest / the "Pin It" button, and Pinterest can collect statistical information about usage of their service.

_routing_id - This is a first-party cookie placed by the Pinterest Tag that helps ensure Pinterest website users are being directed to the latest version of The _routing_id cookie contains a randomised value that Pinterest uses to help manage the rollout of new changes Pinterest makes to their website.

_uetsid - This cookie is used by Bing to determine what ads should be shown that may be relevant to the end user perusing the site.

ad-id - This cookie is generally provided by for advertising purposes.

ad-privacy - This cookie is generally provided by for advertising purposes.


IDE - This domain is owned by Doubleclick (Google). The main business activity is: Doubleclick is Googles real time bidding advertising exchange

MUID - This cookie is widely used my Microsoft as a unique user identifier.  It can be set by embedded microsoft scripts.  Widely believed to sync across many different Microsoft domains, allowing user tracking.

test_cookie - This cookie is set by DoubleClick (which is owned by Google) to determine if the website visitor's browser supports cookies.

Analytical Cookies help us monitor site performance.


_clck - Persists the Clarity User ID and preferences, unique to that site, on the browser. This ensures that behavior in subsequent visits to the same site will be attributed to the same user ID.

_ga – This cookie name is associated with Google Universal Analytics - which is a significant update to Google's more commonly used analytics service. This cookie is used to distinguish unique users by assigning a randomly generated number as a client identifier. It is included in each page request in a site and used to calculate visitor, session and campaign data for the sites analytics reports.  By default it is set to expire after 2 years, although this is customisable by website owners._ga

_gclxxxx – Google conversion tracking cookie

_gid – This cookie name is associated with Google Universal Analytics. This appears to be a new cookie and as of Spring 2017 no information is available from Google.  It appears to store and update a unique value for each page visited._gid

_hjAbsoluteSessionInProgress – This cookie is used by HotJar to detect the first pageview session of a user. This is a True/False flag set by the cookie.

_hjFirstSeen – Identifies a new user's first session on a website, indicating whether or not Hotjar's seeing this user for the first time.

_hjIncludedInPageviewSample - This cookie is set to let Hotjar know whether that visitor is included in the data sampling defined by your site's pageview limit.

_hjIncludedInSessionSample_474358 – A cookie that holds the current session data. This ensues that subsequent requests within the session window will be attributed to the same Hotjar session.

_hjSession_474358 – A cookie that holds the current session data. This ensues that subsequent requests within the session window will be attributed to the same Hotjar session.

_hjSessionUser_474358 - Hotjar cookie that is set when a user first lands on a page with the Hotjar script. It is used to persist the Hotjar User ID, unique to that site on the browser. This ensures that behavior in subsequent visits to the same site will be attributed to the same user ID.

_hjTLDTest – When the Hotjar script executes we try to determine the most generic cookie path we should use, instead of the page hostname. This is done so that cookies can be shared across subdomains (where applicable). To determine this, we try to store the _hjTLDTest cookie for different URL substring alternatives until it fails. After this check, the cookie is removed.

_pin_unauth - This cookie is assocate with pinterest.  It is used to track the usage of services.

_uetvid – This is a cookie utilised by Microsoft Bing Ads and is a tracking cookie. It allows us to engage with a user that has previously visited our website.

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