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We sometimes place small data files on your computer. These are known as cookies. Most websites do this.

They improve things by:

  • remembering settings, so you don't have to keep re-entering them whenever you visit a new page
  • remembering information you've given (eg your postcode) so you don't need to keep entering it
  • measuring how you use the website so we can make sure it meets your needs

Our cookies aren't used to identify you personally. They're just here to make the site work better for you. Indeed, you can manage and/or delete these small files as you wish.

Find out more about how to manage cookies. Or please read on to find out more about how and where we use cookies.

How we use cookies

We use cookies in several places - we've listed each of them below with more details about why we use them and how long they will last.

Optional cookies

These cookies can be turned on or off using the cookies panel on the bottom left of our website. 

Measuring website usage (Google Analytics)

We use Google Analytics to collect information about how people use this site. 

Google Analytics stores information about what pages you visit, how long you are on the site, how you got here and what you click on.

We do not collect or store your personal information (e.g. your name or address) so this information cannot be used to identify who you are. We do not allow Google to use or share our analytics data.

The following cookies are set by Google Analytics.

AMP_TOKEN: persistent, expires after an hour

_ga: persistent, expires after two years

_gat: persistent, expires after one minute

_gid: persistent, expires after 24 hours

_utma: persistent, expires after two years

_utmb: persistent, expires after 30 minutes

_utmc: session, deleted when you close your browser

_utmt: persistent, expires after 10 minutes

_utmv: expires immediately

_utmz: persistent, expires after six months


You can opt out of Google Analytics cookies by visiting this page on Google.


We use Hotjar in order to better understand our users' needs and to optimise this service and experience.

Hotjar is a technology service that helps us better understand our users' experience (e.g. how much time they spend on which pages, which links they choose to click, what users do and don't like, etc.) and this enables us to build and maintain our service with user feedback.

Hotjar uses cookies and other technologies to collect data on our users' behaviour and their devices.

This includes a device's IP address (processed during your session and stored in a de-identified form), device screen size, device type (unique device identifiers), browser information, geographic location (country only), and the preferred language used to display our website.

Hotjar stores this information on our behalf in a pseudonymised user profile.

Hotjar is contractually forbidden to sell any of the data collected on our behalf.

For further details, please see the 'about Hotjar' section of Hotjar's support site.

The following cookies are set by Hotjar:

  • hjDonePolls
  • This cookie is a hotjar cookie and it is set once a visitor completes a poll using the feedback poll widget.
  • Expires 1 Year.


  • _hjIncludedInSample
  • This session cookie is set to let hotjar know whether that visitor is included in the same which is used to generate heat maps and recordings etc.
  • Expires sessional

Social media

Some social media sites set the following  cookies:


  • PREF
  • Used to remember user preferences such as language settings
  • Expires 2 years


  • Set when viewing a page with YouTube videos on it. It is set by Youtube so they can count the views of embedded Youtube videos on them
  • Expires 9 months


  • VSC
  • Used by YouTube's privacy enhanced mode
  • Expires when you close your browser


  • remote_sid
  • Used by YouTube's privacy enhanced mode
  • Expires when you close your browser



  • __atuvc
  • __atuvs
  • _at.cww
  • at-lojson-cache-#
  • at-rand
  • loc
  • r/collect
  • uvc
  • xtc

Necessary cookies

These essential cookies do things like remember your progress through a form. They always need to be on.

  • Cookie control
  • Saves a message to let us know that you have seen our cookie message
  • Expires 90 days


  • seen_cookie_message
  • Saves a message to let us know that you have seen our cookie message
  • Expires 90 days

Necessary cookies enable core functionality. The website cannot function properly without these cookies, and they can only be deactivated by changing your browser preferences.

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