In January 2011, months before the closure of the News of the World and her resignation as chief executive of News International, Brooks emailed a request copying in former head of security and co-defendant Mark Hanna.
It read: "Can you have my office swept... Thanks. Discreetly."
News International offices were routinely searched for listening devices to ensure rival journalists could not find out about scoops and to keep private any discussions about Murdoch's bid for the British satellite broadcasting, broadband and telephone services company BSkyB, Jane Viner, NI group director for property and facilities, said.
William Clegg, counsel for Hanna, said there were a number of reasons to sweep the office for bugs. "One obviously was newspaper are very competitive with each other, and some journalists may be anxious to try to steal a scoop from a rival.
"One of the reasons for the sweeps was to avoid that possibility.
"It was a sensitive topic at News Corp, and another reason why you would want to be sure discussions about such a matter were not broadcast to people who were potential competitors."
Viner also said Brooks had been sent "threatening" post as the hacking allegations emerged.
Most were intercepted in the post room, and the rest were usually spotted by personal assistants, she added.
During 2011, security around the company's bosses was stepped up and Brooks was given the codename Blackhawk, the court heard.
All seven defendants in the case, including Brooks' husband Charles Brooks, Cheryl Carter, Stuart Kuttner, Clive Goodman and Andy Coulson, deny all the charges.
The phone-hacking scandal is a controversy involving the now defunct News of the World and other British newspapers published by News International, a subsidiary of the then-News Corporation. Employees of the paper were accused of engaging in phone hacking, police bribery and exercising improper influence in the pursuit of publishing scoops.
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
