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Cookie information

NHS Blood and Transplant use cookies to ensure users get the best possible experience when visiting this website. If you continue without changing your settings, we will accept your consent to receive these cookies. To disable cookies you may change your browser settings at any time. Go to aboutcookies.org for information on how to do this.

Cookie information

Cookies are small information files placed on your device. They are widely used to improve services, for example:
Measuring how many people are using the websites we provide, so we can make them easier and faster to use
Analysing data, anonymously, to help us understand how people interact with NHSBT websites

Cookies cannot be used to identify you personally. To find out more about your personal data visit our privacy page.


We also use cookies for online retargeting purposes to show you relevant adverts from us on third party sites, including social media websites, based on pages you have visited on our site and others.

We hold cookie information for 30 days before the cookie expires.

How to remove cookies

For more information about how to remove cookies from your device, or how to block individual cookies from being set, please see the instructions and guidance at www.aboutcookies.org.

See below for further details about cookies you may encounter while visiting NHSBT websites. These details include what information is being held and how long you can expect it to be stored.

Main Cookies

Names: _utma, _utmb, _utam, _utmc, _utmz
Domains: nhs.uk, blood.co.uk, google.com
Lifespan: Up to six months
Purpose: NHSBT uses Google Analytics cookies to record information about which pages you have landed on and how you have navigated through the site. This data enables us to understand:
Which pages are most popular
Which pages people visit on the site
Which internet browsers are being used
How visitors prefer to use our websites
The information gathered is not shared with any other third party.

Names: cookie, ASP.NET_SessionID
Domains: nhs.uk, blood.co.uk
Lifespan: session (a visit)
Purpose: This cookie is set to ensure the user does not have any disruption to their user experience while accessing an NHSBT website. This cookie holds no personal information, but helps us provide our users with an uninterrupted journey through the website.

Names: sifrFetch
Domains: nhs.uk, blood.co.uk
Lifespan: session (a visit)
Purpose: This cookie is used for sIFR (Scalable Inman Flash Replacement) to display custom fonts. This cookie indicates whether the browser supports Flash and thus sIFR or not. It is deleted when the browser is closed.

Third-party Cookies

The following are third-party cookies you may come across on NHSBT websites:

Name: id, LO, UA, ID, Id, OAX, Mdata, RMF*, NSC*, ANON_ID
Domains: *.doubleclick.net, amgdgt.com, mookie1.com, tribalfusion.com
Lifespan: Up to 2 years
Purpose: adserver tags from DoubleClick are used to understand how people engage with government digital media campaigns. This functionality allows NHSBT to track clicks on adverts, such as the "sponsored links" found when you search for a subject on Google. The others are used by analytics to record information about which pages you have landed on and how you have navigated through the site. The privacy statements for each of these suppliers is available below:

Data from Google's Interest-based advertising or 3rd party audience data with Google Analytics is used to analyse and segment data for marketing purposes.
Doubleclick – https://www.google.com/intl/en/policies/privacy/ads/
amgdgt.com – http://adconiondirect.com/Adconion%20Direct%20Inc%20Privacy%20Policy.doc
mookie1.com – http://www.xaxis.com/page/privacy-policy
tribalfusion.com – http://www.exponential.com/about-us/privacy.html