Trendstream Limited Non-Panellist Privacy Policy


Welcome to our Privacy Policy.

Trendstream Limited is a research company that aims to understand the views of internet users. Your privacy is our priority. So, on this page we’ve outlined what information we collect about you, how we use it and where we store it.

We’ve tried to make everything which follows as clear and as simple as possible, but if you have questions, you can contact us, and we’ll be happy to help. (See the “Contact Us” section below.)


Purposes of the policy

This Privacy Policy aims to provide information on how we collect and process data collected through our use of cookies and other technologies when an individual interacts with a website or advertising campaign of one of our clients. Any information that we collect is subject to our Privacy Policy in effect at the time that information is collected.

This policy provides specific information regarding our processing of data collected through the tracking of cookies and other technologies.

If you are a customer of Trendstream Limited, further information on our processing of data collected from you can be found in the Trendstream Limited General Privacy Policy here

If you have completed a GlobalWebIndex survey, we will process the data collected when you completed the survey in accordance with our Survey Privacy Policy here

It is important that you read this Privacy Policy together with any other privacy notice or fair processing notice we may provide on specific occasions when we are collecting or processing personal data about you, so that you are fully aware of how and why we are using your data. This Privacy Policy supplements the other notices and is not intended to override them.

Changes to this Privacy Policy           

We may change this policy from time to time. Although we will strive to ensure that any such changes are small, and we will inform you and, if appropriate, seek your consent if we intend to materially change the way in which we use your data, we recommend that you consult this Privacy Policy regularly for updates.


This Privacy Policy describes our collection, use, disclosure, retention and protection of your personal data which is collected from you when you interact with an advertising campaign or website of one of our clients (which, for the purpose of this Privacy Policy, we describe as “Client Campaigns”).

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We collect, process and retain personal information from you and any devices you may use when you access any Client Campaigns.

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We use cookies to track your interaction with any Client Campaigns, which involves our processing data about you in an automated way to evaluate which parts of a site you have engaged with, and which advertising campaigns you have seen.

We use information regarding your device to understand whether you are part of the GlobalWebIndex panel.

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Your rights

You have certain rights regarding our processing of your personal data. Further information on the rights you may have, and how to exercise such information can be found here:  

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Disclosure and security

We may disclose your personal data to other companies within the Trendstream group, to third party service providers and where we otherwise have a legal right to do .

We protect your information using measures that reduce the risks of loss, misuse, unauthorised access, disclosure and alteration.

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If you have a question about this Privacy Policy, please contact us at:


Personal data means any information about an individual from which that person can be identified. We may collect, use, store and transfer different types of data about you:

  • Technical Data. We might also collect your internet protocol (IP) address, browser type and version, time zone setting and location, browser plug-in types and versions, Operating system (type and version) and information about device (type and version) (including your device’s unique identifying codes (e.g. advertising ID)) you use to access Client Campaigns.
  • Cookies. We use “cookies” and similar analytics-driven technologies to track interaction with Client Campaigns. Where a cookie is stored on your device, we assign a unique cookie ID to that device. See the “Cookies” section below and our Cookies policy (available here) for further information on our use of cookies.


How is your data collected?

As you interact with a Client Campaign, we automatically collect Technical Data about your equipment and we also collect data regarding you browsing actions and patterns. We collect this data by using cookies and other similar technologies. Please see our cookie policy here for further details.


How we use your data

We use cookies to track your interaction with Client Campaigns. This helps our clients understand how its audience is interacting with the relevant Client Campaign, to evaluate effectiveness of their ad campaigns. Further information on how we use cookies with our partners is set out in the cookies section below.

We also aggregate your cookie ID with the anonymous cookie IDs we receive from other individuals interacting with a particular Client Campaign. We use these aggregated Cookie IDs to provide our clients with an estimation of the unique number of visitors to that Client Campaign. Aggregating data in this way enables us and our clients to understand the effectiveness of their Client Campaigns. 


Our basis for processing your data

We will only use your personal data when the law allows us to. We have set out below, in a table format, a description of all the ways we plan to use your personal data, and which of the legal bases we rely on to do so. We have also identified what our legitimate interests are where appropriate.

Note that we may process your personal data for more than one lawful ground depending on the specific purpose for which we are using your data.


Type of data

Lawful basis for processing including basis of legitimate interest

To manage our relationship with you which will include understanding whether you are one of our existing survey panel members

(a) cookie ID

(b) advertising ID

(c) IP address

Necessary for our legitimate interests (to enable us to categorise our visitors as existing survey panel members or non-members).

To estimate the number of unique individuals taking an action in aggregate

(a) cookie ID

(b) advertising ID

(c) IP address

Such processing is necessary for our legitimate interests (to assist our clients in understanding approximately how many end users interact with their advertising campaigns and websites).


Change of purpose

We will only use your personal data for the purposes for which we collected it, unless we reasonably consider that we need to use it for another reason and that reason is compatible with the original purpose. If you wish to get an explanation as to how the processing for the new purpose is compatible with the original purpose, please contact us.

Please note that we may process your personal data without your knowledge or consent, in compliance with the above rules, where this is required or permitted by law.



A cookie is a small file containing a string of characters that is sent to your device when you visit a website. We and/or our third-party partners may use both session cookies (which expire once you close your web browser) and persistent cookies (which stay on your device until you delete them or they expire – usually after 1 year).  Further detail in relation to the cookies that we may use are set out in our cookies policy here.

We and our partners use cookies to provide you with the best possible user experience, and also to track your online activity for the following :

  • To establish whether you are an existing survey panel member.  The cookie ID we assign to the device you use to interact with a Client Campaign will tell us whether or not you have previously agreed to complete surveys for us. If you are a member of the GlobalWebIndex panel, we will process the information collected through our tracking of cookies in accordance with our Survey Privacy Policy
  • To estimate the number of unique visitors to a Client Campaign. As mentioned above, we use cookies to track the number of unique visitors to a Client Campaign.

Important note about cookies: We always want you to be in control of the information you share with us, and there are a number of ways that you can remove or block cookies at any time, including by following the help file directions in your internet browser. But if you want to tell us right now that you don’t want us to use cookies, then you can opt-out of this process here.

When you opt out, we delete the existing values in our cookie on your device and replace them with an “opt out” value which tells our server not to continue to track your behaviour, and we will ignore all subsequent requests coming from your browser. Please note that if you block cookies, our opt-out process may not function properly. Please also note that if you choose to opt-out now, but then at some point later you decide to delete, block, or otherwise restrict cookies, or if you use a different device or internet browser, you will need to renew your opt-out choice.

If you decide you want to opt-out of our cookie process at some point in the future rather than now, you can always visit the original survey site where you were first invited to take part in one of our surveys, and tell them. Alternatively, you can come back to this Trendstream opt-out page.


Disclosures of your personal data


We may disclose your data to third parties such as:

  • Other members of our group of companies;
  • Authorised third-party service providers who provide IT and administration services to us to help us to provide our services;
  • Professional advisers including lawyers, bankers, auditors and insurers who provide consultancy, banking, legal, insurance and accounting services; and
  • Third parties to whom we may choose to sell, transfer, or merge parts of our business or our assets. Alternatively, we may seek to acquire other businesses or merge with them.

We require all third parties to respect the security of your personal data and to treat it in accordance with the law. We do not allow our third-party service providers to use your personal data for their own purposes and only permit them to process your personal data for specified purposes and in accordance with our instructions. If a change happens to our business, then the new owners may use your personal data in the same way as set out in this privacy notice.

International transfers

We share your personal data with other companies within our group. This will involve transferring your data outside the European Economic Area (EEA). Some of our external third-party service providers are based outside the European EEA so their processing of your personal data will involve a transfer of data outside the EEA.

Whenever we transfer your personal data out of the EEA, we ensure a similar degree of protection is afforded to it by ensuring at least one of the following safeguards is implemented:

  • We will only transfer your personal data to countries that have been deemed to provide an adequate level of protection for personal data by the European Commission.
  • Where we use certain service providers, we may use specific contracts approved by the European Commission which give personal data adequate protection.
  • Where we use providers based in the US, we may transfer data to them if they are part of the Privacy Shield which requires them to provide an equivalent level of protection to personal data shared between the Europe and the US.

Data security

We have put in place appropriate security measures to prevent your personal data from being accidentally lost, used or accessed in an unauthorised way, altered or disclosed. In addition, we limit access to your personal data to those employees, agents, contractors and other third parties who have a business need to know. They will only process your personal data on our instructions and they are subject to a duty of confidentiality.

We have put in place procedures to deal with any suspected personal data breach and will notify you and any applicable regulator of a breach where we are legally required to do so.

How long will you use my personal data for?

We will only retain your personal data for as long as necessary to fulfil the purposes we collected it for, including for the purposes of satisfying any legal, accounting, or reporting requirements.

To determine the appropriate retention period for personal data, we consider the amount, nature, and sensitivity of the personal data, the potential risk of harm from unauthorised use or disclosure of your personal data, the purposes for which we process your personal data and whether we can achieve those purposes through other means, and the applicable legal requirements.

In some circumstances we may anonymise your personal data (so that it can no longer be associated with you) for research or statistical purposes, in which case we may use this information indefinitely without further notice to you.

Your legal rights

Under certain circumstances, you have rights under data protection laws in relation to your personal data:

  • The right of access: your right to obtain confirmation as to whether or not personal data are being processed, and, where that is the case, access to the personal data along with details regarding the nature of processing.
  • The right of rectification: your right to obtain the rectification of inaccurate personal data.
  • The right of portability: your right to receive your personal data in a structured, commonly used and machine-readable format.
  • The right to be forgotten: your right to erase your personal data. This enables you to ask us to delete or remove personal data where there is no good reason for us continuing to process it.
  • The right to restrict processing: your right for your data to be effectively ‘frozen’; stored and not further processed.
  • The right to object: your right to object to how your personal data is processed where we are re relying on a legitimate interest (or those of a third party).

Submit your right here:

If you would like exercise one of your rights listed above please send an email to


Please use the email template below to confirm the right you wish to exercise together with details of the data in respect of which you are exercising such right. 


Subject: <The right you would like to exercise> 

Body: <name>

<The right you would like to exercise>

<grounds for your request (where applicable)>

<personal data which is subject to the rights request>


What we may need from you 

Where you wish to exercise on of the rights listed above, we may need to request specific information from you to help us confirm your identity and ensure your right to access your personal data (or to exercise any of your other rights). This is a security measure to ensure that personal data is not disclosed to any person who has no right to receive it. We may also contact you to ask you for further information in relation to your request to speed up our response.

Where we are not able to determine with any degree of certainty whether the information requested by you relates exclusively to you, our disclosure of such information to you may pose a privacy risk to a third party (for example, where a cookie ID is associated with a device used by more than one person). We will assess each request to exercise any of the rights listed above individually on its merits and will disclose the requested information where we are satisfied that such disclosure does not represent a privacy risk to any third party.

Other Things to Know

We will take all steps reasonably necessary to ensure that your data is treated securely and in accordance with this Privacy Policy. Unfortunately the transmission of information via the internet is not completely secure, and although we will do our best to protect your data, we cannot guarantee the security of your data transmitted to us; and therefore any transmission is at your own risk.

Contact Us

If you want to ask us any questions, please get in touch with us at Or you can write to us at the following address:

Trendstream Limited

Nexus Building

Floor 2

25 Farringdon Street




Cookie Notice


In connection with the cookies set by Trendstream Limited, a unique identification number will be stored in or associated with the cookies or related technologies. A cookie is a piece of information placed on your computer’s browser when you visit a website. We use cookies to track your internet activity, including what pages you visit on other sites, to determine the effectiveness of advertising on your behaviour.

Further information on our processing of the information collected from our use of cookies or related technologies on your device can be found in our Privacy Policy here.

Below please find descriptions of the cookies and similar technologies we use, including our tracking cookies. You can manage the use of cookies and similar technologies by expressing your preferences as set forth below.  Please understand that if you exercise your right to opt-out of a cookie, we will place a cookie on your device typically referred to as an “opt out cookie”. If you later clear your cookies, you will also remove this opt out cookie and you will have to renew your choices. To access the opt-out links after you consent, please visit

Please be aware that the use of cookies is browser-specific. If you use multiple browsers or devices, you will need to modify your preferences on each one.


Advertising Cookie:

Name of Cookie

Purpose of Cookie

Opt-Out Link


Web analytics & advertising effectiveness