Jump to the following:

By continuing, you agree to the use of cookies by us and third parties, which we use to improve your visit.

Cookies set by our main website

This is about www.ordnancesurvey.co.uk. Other domains we own might bring you here.

First-party cookies

First-party cookies are set by the website you're visiting and can only be read it.

Google Analytics

We use Google Analytics to measure website traffic. This helps us provide targeted, useful content.

Name Function Expires
__utmaUsed to distinguish users and sessions.

The cookie is created when the javascript library executes and no existing __utma cookies exists.

The cookie is updated every time data is sent to Google Analytics.
2 Years
__utmbUsed to determine new sessions/visits.

The cookie is created when the javascript library executes and no existing __utmb cookies exists.

The cookie is updated every time data is sent to Google Analytics.
30 Minutes
__utmcNot used in ga.js.

Set for interoperability with urchin.js. Historically, this cookie operated in conjunction with the __utmb cookie to determine whether the user was in a new session/visit.
Session
__utmt_buTUsed to throttle request rate.10 Minutes
__utmt_rTUsed to throttle request rate.10 Minutes
__utmzStores the traffic source or campaign that explains how the user reached your site.

The cookie is created when the javascript library executes and is updated every time data is sent to Google Analytics.
End of the current year
__utmvUsed to store visitor-level custom variable data.

This cookie is created when a developer uses the _setCustomVar method with a visitor level custom variable. This cookie was also used for the deprecated _setVar method.

The cookie is updated every time data is sent to Google Analytics.
2 Years
gaUsed to distinguish users.2 Years
_gat_UA-xxxxxxx-xxUsed to throttle request rate.5 Minutes
_gat_customUsed to throttle request rate.5 Minutes
_utmt_UA-xxxxxxx-xutmt = Indicates the type of request, which is one of: event, transaction, item, or custom variable.10 Minutes
__utmliUsed by Google Analytics to track visitor behaviour and report on site performance.

This optional additional cookie supports an Enhanced Link Attribution feature, which allows webmasters to see the performance of two or more links on a page that have the same destination.
30 Seconds
_dc_gtm_UA-xxxxxxx-xxGoogle Tag Manager: used to manage analytics scripts on the website.3 Minutes

Visual Website Optimizer

We use VWO to test website design ideas by showing them to some of our visitors.

Name Function Expires
_vwo_uuid_v2Used by Visual Web Optimizer when testing new functionality on the website.1 Year
_vis_opt_exp_xxx_combiThis cookie is generated when users reach a particular combination. This makes sure that users see the same variation that they earlier saw when they visited the page.100 Days
_vis_opt_exp_xxx_combiThis cookie is generated when users reach a particular combination. This makes sure that users see the same variation that they earlier saw when they visited the page.100 Days
_vis_opt_exp_xxx_goal_xThis cookie is generated when a goal is made.100 Days
_vis_opt_sThis cookie detects if the user is new or returning to a particular campaign.100 Days
_vis_opt_test_cookieSession
_vwo_uuid_v2This cookie generates a unique id for every visitor and is used for the report segmentation feature in VWO, and it also allows you to view data in a more refined manner. If you have the campaign running on multiple domains, you will notice campaign specific UUID values.1 Year

Ecommerce

Name Function Expires
nlsridxxxxxUsed by map shop checkout to identify and manage users and their purchases.1 Year
nlssidxxxxxSession

Survey tools

Name Function Expires
ecos.dtSet by the eDigital.com survey. Our survey code sets and updates this cookie once every half-second to a value which represents the current date/time.

It tracks the latest point in time a respondent has one of our clients' websites open, and is used to trigger exit surveys.

This is a session cookie, deleted when the browsing session is finished.
Session
_we_wk_ss_lsfUsed by WebEngage survey software to check if you have visited our website before, whether or not you have completed a survey before and the last time you did so - See more at: http://www.nhm.ac.uk/about-us/cookies.html#sthash.II6qW4MF.dpufSession

Web server

Name Function Expires
BIGipServerprod_webgate_http_plThis cookie name is associated with the BIG-IP product suite from company F5.

Usually associated with managing sessions on load balanced servers, to ensure user requests are routed consistently to the correct server.
1 Hour
ObFormLoginCookieOracle Single Sign On cookieSession
ObSSOCookieOracle Single Sign On cookie set on a successful authenticationSession
prod_webgate_http_plThis cookie name is associated with the BIG-IP product suite from company F5.

Usually associated with managing sessions on load balanced servers, to ensure user requests are routed consistently to the correct server.
3 Minutes
XSRF-TOKENA security measure authenticating any requests made against your current sessionSession
PHPSESSIDUsed on the web server, by PHP, to track the current user's browsing session.Session
BIGipServerprod_varnish1_http_plThis cookie name is associated with the BIG-IP product suite from company F5.

Usually associated with managing sessions on load balanced servers, to ensure user requests are routed consistently to the correct server.
Session
prod_varnish2_6081_plGenerated by the web server caching software.3 Minutes
MOCKSESSIDUsed for software testing on the web serverSession
prod_tomcatx_http_plUser to track the users status when ordering OpenData.3 Minutes
connect.sidUsed to establish and continue a user session with the site14 Days
readme_appTo remember your selections or preferences that you’ve already made when looking at information or using a serviceSession
JSESSIONIDTo remember your selections or preferences that you’ve already made when looking at information or using a serviceSession

User setting

Name Function Expires
helpTourSet once the user has viewed the help screens, preventing them from being shown on subsequent visits.1 Year
productViewedKeeps track of the last product viewed by the user, so it can pre-populate enquiry forms with the products details.Session
savedDeviceStores your generic device type in order to deliver either a mobile or desktop version of the website.1 Year
cookieMessageIs set when a user has read the cookie policy message, preventing the same message being displayed again.1 Year
productfinderLastValsKeeps track of the last used filter values, to repopulate the filter on the users returnSession

Forums

Name Function Expires
Forum-sidVanilla forums session ID cookies to identify user's log-in status.Session
Forum-tkSession

Third-party cookies

Third-party cookies are set by websites other than the one you are actually visiting. Unlike first-party cookies, the information they contain can be read by another website.

YouTube Video

Name Function Expires
PREFGoogle set a number of cookies on any page that includes a Youtube video.

While we have no control over the cookies set by Google, they appear to include a mixture of pieces of information to measure the number and behaviour of Youtube users, including information that links your visits to our website with your Google account if you are signed in to one. Information about your use of our website, including your IP address, may be transmitted to Google and stored on servers in the United States.

This cookie does not identify you personally unless you are logged into Google, in which case it is linked to your Google account.
8 Months
VISITOR_INFOFirst_LIVE8 Months
YSCSession

Advertising via Doubleclick

Name Function Expires
DSIDWe also use cookies for advertising we serve across the web.

Our main advertising cookie on non-Google sites is named ‘id’ or ‘IDE‘ and is stored in browsers under the domain doubleclick.net.

We use other cookies with names such as DSID, FLC, AID, TAID, and exchange_uid. Other Google properties, like YouTube, may also use these cookies to show you more relevant ads.
1 Minute
IDE2 Years
id2 Years

Survey

Name Function Expires
en-persistSet by the eDigital.com survey. This cookie is created by our site infrastructure in order to ensure web traffic is evenly distributed between our servers.

This cookie contains no tracking information and is not used by our research or other software in any way other than to ensure your traffic is correctly distributed.

The cookie is deleted at the end of the session.
Session

Google

Name Function Expires
CONSENTMost Google users will have a preferences cookie called ‘NID’ in their browsers. A browser sends this cookie with requests to Google’s sites.

The NID cookie contains a unique ID Google uses to remember your preferences and other information, such as your preferred language (e.g. English), how many search results you wish to have shown per page (e.g. First0 or 20), and whether or not you wish to have Google’s SafeSearch filter turned on.
21.5 Years
NIDEnd of the current year
DV7 Minutes

On our map shop pages:

NameFunctionExpires
VARNISH/CUSTOMER_LOGGED_IN
Used for improving caching and speed performance of the website when customer is logged in
2h
VARNISH/CART_NOT_EMPTYUsed for improving caching and speed performance of the website when cart is not empty2h
VARNISH/FLASH_MESSAGE_LOCALUsed for improvivg caching and speed performance of the website when we have a 1 time notice message2h
VARNISH/FLASH_MESSAGE_GLOBALUsed for improving caching and speed performance of the website when we have a 1 time notice message2h
CARTThe association with your shopping cart.1year
CATEGORY_INFOStores the category info on the page, that allows to display pages more quickly.when browser closes
COMPAREThe items that you have in the Compare Products list.2h
CURRENCYYour preferred currency2h
CUSTOMERAn encrypted version of your customer id with the store.2h
CUSTOMER_AUTHAn indicator if you are currently logged into the store.2h
CUSTOMER_INFOAn encrypted version of the customer group you belong to.2h
CUSTOMER_SEGMENT_IDSStores the Customer Segment ID
2h
FRONTENDYou sesssion ID on the server.2h
GUEST-VIEWAllows guests to edit their orders.10 min
LAST_CATEGORYThe last category you visited.when browser closes
LAST_PRODUCTThe most recent product you have viewed.when browser closes
NEWMESSAGEIndicates whether a new message has been received.when browser closes
NO_CACHEIndicates whether it is allowed to use cache.2h
PERSISTENT_SHOPPING_CARTA link to information about your cart and viewing history if you have asked the site. Not enabled at the moment1year
STOREThe store view or language you have selected.when browser closes
USER_ALLOWED_SAVE_COOKIEIndicates whether a customer allowed to use cookies.when browser closes
VIEWED_PRODUCT_IDSThe products that you have recently viewed.2h
sc.UserIdUsed for our software tools to measure and collect session information including length of visits and page interaction information.1 year
sc.ASP_NET_SESSIONIDUsed for our software tools to measure and collect session information including length of visits and page interaction information.when browsing session ends

On orders.ordnancesurvey.co.uk:

NameFunctionExpires
prod_as101202_http_pool (AKA prod_webgate_http_pool, BIGipServerprod_as101202_http_pool, prod_psma_https_pool, ObSSOCookie,ObFormLoginCookie, Fpc1000624392500)Enables our server load-balancing software to maintain your communication with one specific server and, if you have logged in to one of our sites, to specify that your connection must be secure (via https).One hour
JSESSIONIDTo remember your selections or preferences that you’ve already made when looking at information or using a serviceWhen browser closes
mapSettings (Flash cookie)To remember the extent (area) of the last map that you viewedNever, unless manually deleted

On apidocs.os.uk:

Name Function Expires
readme_appTo remember your selections or preferences that you’ve already made when looking at information or using a serviceWhen browser closes
connect.sidUsed to establish and continue a user session with the site1 year
site_passwordThe public password to the site (may be set to empty)7 days
XSRF-TOKENA security measure authenticating any requests made against your current sessionWhen browser closes

Back to top
© Ordnance Survey 2018