Ashley Chapel Logistics

 (ACL) was a computer software company owned by Ashley Chapel. He started it in 1989. Their corporate offices were on the top floor of Canary Wharf Tower. They had algebraically solved Fermat's Last Theorem by 1999, but hadn't published it. (PROSE: Millennial Rites) After I2 went out of business, (PROSE: System Shock) ACL bought most of their patents. (PROSE: Millennium Shock)

Melanie Bush was offered a job with ACL after she graduated from London University, but stowed away in the TARDIS before she could take it. (PROSE: Business Unusual)