The British Library Legal Deposit Bot
The British Library Legal Deposit Bot is a generic scraper operated by The British Library. Intent varies case-by-case, some scrapers are legitimate research, some power useful aggregators, some are abusive.
Look at the request pattern before deciding what to do. A polite scraper crawls slowly, respects robots.txt, and identifies itself. An abusive one ignores all three.
If you are not sure, the safest move is to rate-limit rather than block outright. That keeps the legitimate use cases working while neutralizing the abusive ones.
See The British Library Legal Deposit Bot on your own site
Match the User-Agent header on incoming requests against the pattern below.
regex
For higher confidence, also verify the source IP against the operator's published ranges. UA strings can be spoofed; IP ownership is harder to fake.
The polite way is a robots.txt rule. Compliant agents respect it; the others ignore it.
robots.txt
Test a URL
Paste any URL on your site and we'll fetch its robots.txt to check whether The British Library Legal Deposit Bot is allowed.
Renders JavaScript
No
IP verification
User-Agent only
Crawl frequency
Variable
Honors robots.txt
Often ignored
Honors Crawl-delay
No
Should I let The British Library Legal Deposit Bot through?
Watch your logs for a week first. Behavior varies wildly. Observe the request pattern before allow/block decisions.
Does blocking The British Library Legal Deposit Bot affect my Google rankings?
No. The British Library Legal Deposit Bot is not a search-engine crawler. Your ranking on Google or Bing is unaffected by what you do here.
How do I confirm a request is really from The British Library Legal Deposit Bot?
Look at the User-Agent header in your access logs and match it against the strings listed above. Worth knowing that the User-Agent is easy to fake, so this check tells you "the traffic claims to be The British Library Legal Deposit Bot", not "the traffic is genuinely The British Library Legal Deposit Bot". If you need stronger guarantees, look for a reverse-DNS check or wait for The British Library to publish IP ranges.
What's the best way to understand what The British Library Legal Deposit Bot is doing on my site?
Look at which URLs it hits, how often, and what time of day. The request pattern usually tells you whether it's building an index, watching for a specific change, or trying to pull data in bulk. The User-Agent name alone rarely tells the full story.
What's the cleanest way to control The British Library Legal Deposit Bot?
Two layers. Robots.txt for the polite crawlers that read it, and rules at your CDN or edge for the ones that don't. Rankly's Agent Experience handles both from a single config, so you can allow, block, rate-limit, or serve a stripped-down version per bot. Agent Analytics handles the observation half so you know which bots are actually worth a rule.