The point
Proof we can build software that meets the standard a UK regulator actually holds — not just the one a spec claims.
Payroll that reports to HMRC has to be right, every time, under rules that don't forgive rounding. This system was built to that standard and recognised by HMRC.
It's the clearest kind of proof there is: a regulator looked at the work and accepted it. That's the bar we bring to any build.