Circle Case study

Helping the British Business Bank scale its guarantees portal

British Business Bank rapidly scales its guarantees portal to provide over £70 billion in Coronavirus loans – with help from CACI

British Business Bank was thrust into the spotlight when it suddenly needed to provide the government’s coronavirus business support loans to provide support to the UK’s smaller businesses. It had to rapidly scale and redevelop its lending platform to deliver the new products and cope with huge demand. With pressure mounting, flexible support from CACI helped the Bank to accelerate design, testing and implementation in weeks, instead of months.


  • Scale and redesign the existing lending system, under intense time pressure
  • Handle a dramatic increase in volume of applications
  • Test and implement new features – including a lender API
  • Document all changes and tests in line with regulatory standards


  • CACI moved quickly to provide enhanced infrastructure and new development and test environments
  • Dedicated resources – including an embedded DevOps specialist – supported the Bank’s Agile team
  • Concurrent design and implementation further accelerated the process


  • Businesses across the UK have to date benefitted from 1,559,226 government-guaranteed loans worth £70.7bn  to support their cashflow during the crisis through schemes delivered by the British Business Bank
  • Asynchronous database execution handles increased workload without delays
  • Lenders can access the system directly via API, further accelerating the application process
  • Further refinements are being developed and tested

“CACI went above and beyond to make sure we could deliver. Their hard work and flexibility have helped us turn a high-pressure situation into a success story.”

Martin Jones, IT Solution Delivery Director, British Business Bank


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