The collection, related to the Afghan Taliban, includes official newspapers, maps and radio broadcasts.
The British Library said it feared it could be in breach of counter-terrorism laws and had been legally advised not to make the material accessible.
"Although the archive was recognised as being of research value, it was judged that it contained some material which could contravene the Terrorism Act, and which would present restrictions on the Library's ability to provide access to the archive for researchers," a library spokesperson said.
"There's no recipes for making bombs or anything like that," he said.
The project, which was launched in 2012 and included members of the library on its advisory board, has digitised the material and translated it into English.
The British Library said it had been in discussion over whether to acquire material from the project and give access to the archive but it had been legally advised not to.
The UK's Terrorism Acts of 2000 and 2006 make it an offence to "collect material which could be used by a person committing or preparing for an act of terrorism" and criminalise the "circulation of terrorist publications".
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
