The organisation was fined £980,000 ($2.4 million) by the Financial Services Authority when the laptop was stolen from an employee's home last year.
Security company Wick Hill claimed that companies can easily and inexpensively protect against this kind of data leakage with encryption software.
Ian Kilpatrick, chairman of Wick Hill, said: "It really is very easy and economical for companies to protect data on their laptops using encryption software from vendors such as Utimaco.
"This can cost as little as £75 ($186)per device protected and will make it impossible for anyone stealing a laptop to decipher its contents."
Businesses are responsible for safeguarding personal information held on their systems under data protection laws and other regulatory requirements.
"With the ever-increasing use of laptops out of the office, their vulnerability to theft, and the availability now of low-cost security solutions, it is time for companies to take the leap to securing laptops," said Kilpatrick.
"By doing so, they protect key data from potential exposure and meet their regulatory obligations."
Nationwide under fire for customer data loss
By Clement James on Feb 21, 2007 10:10AM