bl.uk_lddc_bot
British Library's legal deposit archiver
About this crawler
bl.uk_lddc_bot is a web crawler identified by the regular-expression pattern bl\.uk_lddc_bot in the User-Agent request header. It is categorised as archiver. Use the regex above to detect, log, allow, or block bl.uk_lddc_bot traffic in your web server, CDN edge rules, or robots.txt.
Block-rate · top 25k sites
0.13%
Technical details
- Name
- bl.uk_lddc_bot
- Pattern
bl\.uk_lddc_bot- Tags
- archiver
- Reference
- https://www.bl.uk/services/legal-deposit/web-archiving
- Added
- 2026/04/26
- Instances
- 1 known sample(s)
Sample User-Agent strings
bl.uk_lddc_bot/3.4.0-20220727 (+https://www.bl.uk/legal-deposit-web-archiving)
Block this crawler
robots.txt — disallow bl.uk_lddc_bot:
User-agent: bl.uk_lddc_bot
Disallow: /
Apache .htaccess — return 403:
RewriteEngine On
RewriteCond %{HTTP_USER_AGENT} bl\.uk_lddc_bot [NC]
RewriteRule .* - [F,L]
Nginx — return 403 inside a server block:
if ($http_user_agent ~* "bl\\.uk_lddc_bot") {
return 403;
}
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