However tests on BB10 and the BlackBerry Balance software have failed the same security requirements and BlackBerry could not offer a date when revised software would be submitted.
A BlackBerry statement said: “We have a long-established relationship with CESG and we remain the only mobile solution approved for use at 'Restricted' when configured in accordance with CESG guidelines. This level of approval only comes following a process which is rigorous and absolutely necessary given the highly confidential nature of the communications being transmitted.