How does PageSourceSearch know what pgs.org.uk is built with?

From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.

How far back does the history of pgs.org.uk go?

To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.

Can I see an older version of a script from pgs.org.uk?

Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.

Which other websites use the same tracking IDs as pgs.org.uk?

Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Site profile

pgs.org.uk

Built with gsap 3.15.0, jquery 0.9.12, gtm, @accessible360/accessible-slick 1.0.1, modernizr 3.6.0, recaptcha, waypoints 4.0.1, cloudflare-insights, isotope-layout 3.0.6, cloudflare-email-decode, vide 0.5.1, startbootstrap-sb-admin-2 4.1.4 and more. 5 pages and 18 stored files, last crawled 2026-10-02.

rank 1,089,508 22 libraries 2 identifiers 20 third-party hosts 1 crawl open the site

Technologies and libraries

Recognised by fingerprinting the stored files and bundles against known releases; a version is the release the bytes match.

Library	Version	Seen
gsap	3.15.0	2026-10-02
jquery	0.9.12	2026-10-02
gtm		2026-10-02
@accessible360/accessible-slick	1.0.1	2026-10-02
modernizr	3.6.0	2026-10-02
recaptcha		2026-10-02
waypoints	4.0.1	2026-10-02
cloudflare-insights		2026-10-02
isotope-layout	3.0.6	2026-10-02
cloudflare-email-decode		2026-10-02
vide	0.5.1	2026-10-02
startbootstrap-sb-admin-2	4.1.4	2026-10-02
pikaday-responsive	0.7.0	2026-10-02
ibp-cdn	3.0.49	2026-10-02
vue-image-lightbox	7.2.0	2026-10-02
anzhiyu-theme-static	1.1.10	2026-10-02
react-owl-carousel	2.3.3	2026-10-02
owl.carousel	2.3.4	2026-09-25
nanogallery2	3.0.5	2026-09-25
remodal	1.1.1	2026-09-25
vue-moment	4.1.0	2026-09-25
@memori.ai/memori-webcomponent	8.3.3	2026-09-25

Tracking, tag and verification IDs

Public identifiers read out of the source. Each links to every other site in the index that carries the same one.

What	Value	Found in
Google Tag Manager container (Google)	GTM-WLFBRRP	view source
reCAPTCHA site key (Google)	6Lc0ebQaAAAAAKk1vueCS7g40TCjvz27ssleqaGN	view source

Third-party hosts

Hosts outside pgs.org.uk that its pages load scripts, frames or stylesheets from, and that its own scripts name in absolute URLs (connect). Each links to every site loading from the same host.

Host	Loaded as	Found in
cdn.interactiveschools.com	script stylesheet connect	view source
instagram.com	connect	view source
media.pressburst.com	connect	view source
mvcbasev2.tiarc-live.co.uk	connect	view source
pinterest.com	connect	view source
player.vimeo.com	connect	view source
pressburst.news	connect	view source
static.cloudflareinsights.com	script	view source
twitter.com	connect	view source
vimeo.com	connect	view source
w.soundcloud.com	connect	view source
wt.soundcloud.test	connect	view source
www.bugherd.com	script	view source
www.facebook.com	connect	view source
www.google.com	script	view source
www.googletagmanager.com	iframe	view source
www.linkedin.com	connect	view source
www.twitter.com	connect	view source
www.w3.org	connect	view source
www.youtube.com	connect	view source

Stored pages and scripts

The newest stored version of each file, newest first@if (p.FilesTruncated) { (the 500 newest of 18) }. Versions are the crawls at which the file was new or its content changed; each opens the file as it was then, rebuilt from the same stored chunks.

File	Kind	Size	Collected	Versions
https://static.cloudflareinsights.com/beacon.min…85bb4c19e7a9bdbcba1788362987495	js library	not fetched	2026-10-02	current
https://www.google.com/recaptcha/api.js	js library	not fetched	2026-10-02	current
https://www.pgs.org.uk/Scripts/Legacy/cards/cards-card.js	js	1.5 KB	2026-10-02	current
https://www.pgs.org.uk/Scripts/Legacy/cards/story-card.js	js	2.2 KB	2026-10-02	current
https://www.pgs.org.uk/Scripts/Legacy/globalMedia.js	js	11.6 KB	2026-10-02	current
https://www.pgs.org.uk/Scripts/Legacy/HomepageMedia.js	js	8.3 KB	2026-10-02	current
https://www.pgs.org.uk/Scripts/Contact/schoolInformation.js	js	3.6 KB	2026-10-02	current
https://www.pgs.org.uk/cdn-cgi/scripts/5c5dd728/…/email-decode.min.js	js	1.2 KB	2026-10-02	current
https://www.pgs.org.uk/Bundles/JS/globalContentP…JDd6bTZ0qKYfHHC7k9saL98eoGJrzOm	js	241.1 KB	2026-10-02	current
https://www.pgs.org.uk/Bundles/JS/Media.output.j…ppjz3umvgd9WPsZN9PMa364aUb4UHlc	js	245.9 KB	2026-10-02	current
https://www.pgs.org.uk/Bundles/JS/Homepage.outpu…3SGBJ4j3b6BUelV0gO0hoPdipbtw4oK	js	195.9 KB	2026-10-02	current
https://www.pgs.org.uk/Bundles/JS/globalSharedTe…qYFYwAnGDoGNpC4HXhMwdniXop5fXpi	js	8.7 KB	2026-10-02	current
https://www.pgs.org.uk/Bundles/JS/global.output.…hHgR28xZSllXvk5O5B9qwo8tFI5i5QP	js	368.4 KB	2026-10-02	current
https://www.pgs.org.uk/admissions/visit-us	html	640.8 KB	2026-10-02	2026-10-02
https://www.pgs.org.uk/contact	html	548.7 KB	2026-10-02	2026-10-02
https://www.pgs.org.uk/about-us/welcome-from-the-head	html	643.8 KB	2026-10-02	2026-10-02
https://www.pgs.org.uk/media/filter/news	html	699.8 KB	2026-10-02	2026-10-02
https://www.pgs.org.uk/	html	305.8 KB	2026-10-02	2026-10-02

Timeline

One entry per crawl, newest first, with what changed since the crawl before: libraries, identifiers, third-party hosts and files. Historical versions stay viewable because the stored chunks are shared between versions, never copied.

2026-10-02 first crawl

5 pages, 18 files, 3.8 MB; 17 libraries, 2 identifiers, 20 third-party hosts
17 libraries added
- gtm
- cloudflare-email-decode
- recaptcha
- vide 0.5.1
- pikaday-responsive 0.7.0
- @accessible360/accessible-slick 1.0.1
- modernizr 3.6.0
- jquery 0.9.12
- gsap 3.15.0
- anzhiyu-theme-static 1.1.10
- vue-image-lightbox 7.2.0
- ibp-cdn 3.0.49
- and 5 more
2 identifiers added
- GTM-WLFBRRP Google Tag Manager container
- 6Lc0ebQaAAAAAKk1vueCS7g40TCjvz27ssleqaGN reCAPTCHA site key
22 third-party hosts added
18 files added

Questions about pgs.org.uk

How does PageSourceSearch know what pgs.org.uk is built with?: From the site's own source code. The crawler stores the exact bytes of its pages and first-party scripts; the libraries are recognised by fingerprinting that code against known releases, the identifiers are read out of the tag snippets, and the third-party hosts are the script, iframe and stylesheet sources in the HTML and the absolute URLs inside the scripts. Nothing is inferred from headers or guessed.
How far back does the history of pgs.org.uk go?: To the first crawl the timeline lists. Every crawl records what the site looked like; when a file's content changes, its earlier version stays viewable because the stored chunks are never deleted, only mapped. A crawl that finds a file unchanged adds no copy.
Can I see an older version of a script from pgs.org.uk?: Yes. In the stored files list, every date under a file opens the version that was live at that crawl, with the same viewer as the current one. The raw bytes can be downloaded from there.
Which other websites use the same tracking IDs as pgs.org.uk?: Each identifier links to its reverse lookup, the list of every site in the index whose source carries the same id: the sites one analytics property or tag manager container is shared across.

Look up another site, browse sites by tracking ID, third-party host or technology. Site owners: see the crawler page for how stored pages are removed.