Source · Select Committees · Public Accounts Committee
Recommendation 16
16
NS&I's core banking engine replacement and data migration pose significant risks
Conclusion
There are still many risks for the Programme to manage, for example the replacement of the ‘core banking engine’ is extremely high risk, but the main work has yet to start.41 NS&I agreed that when it replaced its banking engine, data migration would be a “huge consideration”, and said it knew this would need to be managed “in minute detail”, but gave no details of how it would do this. NS&I’s contract with Atos to run the banking engine expires in 2028, and it will need a new contract after then to ensure continuity.42
Government Response
A response document is linked to this report, dated 7 April 2026. Response attribution to this conclusion has not been verified. Read the response document ↗