Privacy and Cookies Policy

What is a Cookie?

Upon visiting a website or utilising a resource found on one – such as viewing a video, listening to some music or manipulating an interactive map - a small file may be generated and stored on your device. These ‘cookies’ are used for a variety of different purposes but are often created to remember any specific preferences & settings you choose to help improve your future experience on a site, and to allow site owners to see which pages visitors most prefer, how long they spend on the site and how they access the site so that they are able to see how popular their content is. Sometimes cookies are used so that websites with advertisements display marketing messages appropriate to its visitors based on information such as their search history – Google Ads being a popular example of this. Without cookies, a website will think that you are a new person each time you visit and may forget who you are even when you navigate to a new page during a single session.

Cookies may either be short-term (‘session cookies’), lasting only for the duration of your visit and then deleted, or long-term (‘persistent cookies’) to be used on repeated visits.

Cookies may be generated by the website that you are visiting (‘first-party cookies’) but may also be generated by other websites that are responsible for some of the content that you are accessing (‘third-party cookies’). An example of this is the use of an embedded YouTube video used by some websites – as YouTube videos allow for viewers to modify certain settings such as the video resolution, language and the use of subtitles/closed captions, cookies may be used to remember these settings across repeat visits so that you do not have to manually re-enter them each time.

Cookies are device-specific, so accessing a website on your desktop computer with your preferences stored via a cookie may result in a different experience to visiting the same website via an internet-enabled mobile/cellular phone that has yet to have a cookie generated. They are also browser-specific, meaning that in the same manner a website’s cookie may be generated while visiting using a particular browser but when using a different browser on the same device your settings may not transfer over.

What Do We Use Cookies For? utilises the following cookies and for the following purposes. If you choose to disable cookies completely much of the site will remain accessible but you may have difficulties in accessing certain areas and functions.

First-Party Cookies

We use some cookies to gather information based on your interactions with the site with the goal of using this information to improve its function, layout and content and to overall enhance your experience when visiting. All information is anonymised – we generate a random number to identify you during your visit and do not record any information that can be used to identify you.

Cookie Name Duration Description
_eventqueue Persistent Tracks your interactions with the website and allows us to improve its design based on the data we receive.
_jsiud Persistent Stores a random number generated the first time someone visits the website. It is used to better identify new and unique visitors.
_referrer_og Persistent A cookie that records the original referrer to the website (direct link, search engine, etc) so that this same referrer may be associated with your future visits.
cluid Persistent Creates a unique user id to allow for us to track users across more than one website owned by us.
first_pageview Session Generated upon first visiting the webpage and allows for some code to only be loaded upon the first visit, increasing the page loading times on future visits.

Third-Party Cookies

The following cookies are used and maintained by and are generated upon visitation and interaction with the Twitter feed located on the homepage for You may view Twitter’s privacy policy here:

Cookie Name Duration Description
twitter_sess Session Generates a random number to identify the user during a twitter session.
_utma Persistent Stores a random number generated the first time someone visits the website to identify unique visitors. This also includes information regarding the dates you have visited the site.
_utmb Session Stores a random number and works alongside _utmc to calculate the average length of your visit.
_utmc Session Stores a random number and works alongside _utmb to record when the user closes the browser and how long they have spent on the site.
_utmz Persistent Stores a random number and information about how the website was reached, for example via a search engine, via a direct link or via a paid advertisement.
_utmv Persistent Stores user preferences, including default language.
_utmt Session This records any custom variables used during cookie generation.
external_referer Persistent A cookie detailing the original referrer to – in this case
guest_id Persistent A random number generated by that is used to anonymously identify users.
metrics_token Persistent A random number generated by that is used to anonymously identify users.
pid Persistent A random number generated by that is used to anonymously identify users.


Prof Anthony Mathur

Professor of Cardiology & Lead for
Clinical Cardiology

William Harvey Research Institute
Barts & The London School of
Medicine and Dentistry

John Vane Science Centre
Charterhouse Square
London, EC1M 6BQ
United Kingdom

Email :