We use cookies and similar technologies on pdms.com. This page explains what they are, which ones we use, what each one does and how you control them.
What cookies are
A cookie is a small text file that a website stores on your device. Some cookies come from pdms.com. Others come from third parties whose services we use, such as Google or LinkedIn.
Some cookies last only until you close your browser. Others stay on your device until they expire or until you delete them. We also use local storage, which works in a similar way and stays until you clear it.
Your choices
When you first visit pdms.com you will see a banner asking about cookies. You can accept them all, reject everything that is not essential, or open Cookie settings and choose category by category.
We set nothing optional until you choose. If you reject, no analytics or marketing cookie is set at all.
To change your mind at any time, select the Cookie settings link in the footer of any page on this site. That reopens the same panel, and your new choice replaces the old one.
We keep your choice for one year, then ask again.
The categories we use
We group cookies into three categories, the same three you see in the Cookie settings panel.
Strictly necessary. Needed for the site to work and for our forms to be safe to use. These are always on, because the site cannot function without them. You are not asked to consent to them, but we explain them below.
Analytics. Helps us understand how visitors use the site, such as which pages are opened and which links are followed, so we can improve it. Off until you turn it on.
Marketing. Used to measure which of our adverts brought you here, and to show embedded content such as videos. Off until you turn it on.
Strictly necessary cookies
These are set whether or not you make a choice.
|
Name |
Set by |
Purpose |
Expires |
|
.AspNetCore.Antiforgery.<id> |
pdms.com |
Protects our forms against cross-site request forgery |
When you close your browser |
|
.AspNetCore.Mvc.CookieTempDataProvider |
pdms.com |
Carries a one-off message between pages, such as a form confirmation |
When you close your browser |
|
_GRECAPTCHA |
|
Part of Google reCAPTCHA, which scores how likely it is that a form is being filled in by a program rather than a person. We use that score to decide whether to accept the form. This is a Google cookie and it is set on google.com. |
About 6 months |
|
_grecaptcha |
|
Local storage. Supports the same check. |
Until you clear it |
|
sitePopupLastShown |
pdms.com |
Local storage. Remembers when we last showed you a site message, so we do not repeat it. |
Until you clear it |
We treat reCAPTCHA as strictly necessary because it protects our contact forms from automated abuse, and the site cannot safely accept form submissions without it.
Once you answer the banner we also set one cookie to remember what you chose.
|
Name |
Set by |
Purpose |
Expires |
|
_pdms_consent |
pdms.com |
Stores your cookie choices, and a reference you can quote if you contact us about them |
1 year |
This is set whether you accept or reject. It is the record of your decision, so we do not ask you again on every page.
Analytics cookies
Set only if you turn Analytics on. All of them are Google Analytics 4.
|
Name |
Set by |
Purpose |
Expires |
|
_ga |
|
Tells one visitor apart from another |
13 months |
|
_ga_PGMV8PW94F |
|
Holds session state for one of our two Google Analytics properties |
13 months |
|
_ga_NX05HK9YSP |
|
Holds session state for the other |
13 months |
Marketing cookies
Set only if you turn Marketing on.
|
Name |
Set by |
Purpose |
Expires |
|
_gcl_au |
|
Measures which of our adverts led to a visit |
90 days |
|
_gcl_ls |
|
Local storage. Supports the same measurement. |
Until you clear it |
|
bcookie |
|
Identifies your browser to LinkedIn |
1 year |
|
li_gc |
|
Stores your choice about LinkedIn's own cookies |
About 6 months |
|
lidc |
|
Routes your request to a LinkedIn server |
1 day |
|
__cf_bm |
|
Tells automated traffic from real visitors |
30 minutes |
We use LinkedIn Insight to see which of our LinkedIn adverts led to a visit here. Where we have switched those features on, LinkedIn can also group you into an audience and show you our adverts again.
Some of our pages embed a video hosted by Vimeo. If you turn Marketing on, the video loads and Vimeo sets these.
|
Name |
Set by |
Purpose |
Expires |
|
vuid |
Vimeo |
Remembers which videos you have watched |
13 months |
|
__cf_bm |
Vimeo |
Tells automated traffic from real visitors |
30 minutes |
If you leave Marketing off, we show a placeholder in place of the video, with a button that loads it only if you decide you want to see it.
Services that do not set cookies but do see your visit
Some parts of our pages are delivered by other companies. They set no cookie, but their servers see your IP address and the address of the page you are on, because your browser has to ask them for the file.
|
Service |
Company |
What we use it for |
|
use.typekit.net, p.typekit.net |
Adobe |
Web fonts |
|
fonts.googleapis.com |
|
Web fonts |
|
cdn.jsdelivr.net |
jsDelivr |
Layout and interface code |
|
unpkg.com |
unpkg |
Interface code |
|
ajax.googleapis.com |
|
Interface code |
|
ajax.aspnetcdn.com |
Microsoft |
Form validation code |
|
www.google.com |
|
Form protection, described above |
Turning cookies off in your browser
Alternatively, most web browsers allow some control of most cookies through the browser settings. To find out more about cookies, including how to see what cookies have been set, visit aboutcookies.org or allaboutcookies.org.
Find out how to manage cookies on popular browsers:
To find information relating to other browsers, visit the browser developer's website.
To opt out of being tracked by Google Analytics across all websites, visit http://tools.google.com/dlpage/gaoptout.
Changes to this policy
We update this page when the cookies on our site change. It was last reviewed on 28/08/2026.
Questions
If you have a question about how we use cookies, or you want to ask about the consent record we hold, please contact us. If you have a reference from the Cookie settings panel, please quote it. You can also read our privacy and data protection policies.