The Home Office is expected to issue a statement after one of its high-ranking civil servants was suspended amid the fall-out from the criminal records debacle.
The official was relieved of duties after volunteering information to an internal inquiry over the weekend.
A spokeswoman for the First Division Association union - which only represents the service's top echelons, earning on average £55,000 - confirmed the suspended individual was one of its members.
The news diverted some scrutiny away from ministers amid growing pressure on Home Secretary John Reid and his team.
There was immediate speculation it may support his claim - and that of junior ministers Tony McNulty and Joan Ryan - not to have been alerted to the huge backlog of criminal record notifications from Europe awaiting processing.
The ministers have acknowledged that meetings were held between Home Office officials and police over problems entering data on the Police National Computer.
In a bid to quell the growing row, Mr Reid announced on Sunday that he was instigating a root-and-branch review of Britain's criminal databases.
Ms Ryan will also meet EU counterparts this week to discuss improvements in systems for sharing information.
She will press for biometric details - especially fingerprints - to be included on future notifications that Britons have been convicted abroad.
Four drugs offenders and a people smuggler convicted in the EU have so far been confirmed as having passed Criminal Records Bureau checks to work with children and vulnerable adults in Britain - but apparently no violent or sexual offenders were given a clean bill of health.
