In a letter to the Mayor's Office for Policing and Crime (Mopac), the monitoring officer for the Greater London Authority, Ed Williams, said the female staff member said she considered "the core elements" of what had been reported in the media to be "true" and "there was contact".
But defence barrister, Julian Goose QC, said it was not true Mr Piper's company had been engaged as the "single point of contact" for such a wide-ranging task.