Two public officials have admitted misconduct over the sale of stories to tabloid newspapers.
Reggie Nunkoo, 40, of Lynmouth Road, Walthamstow, entered guilty pleas on two counts of conspiring to commit misconduct in a public office while working as a customs officer.
The first relates to an alleged plot with a former Mirror journalist between January 22, 2009 and January 14, 2010.
The second charge was over the customs officer's dealings with two Sun journalists between September 13, 2010 and February 23, 2011, the Old Bailey heard.
During the same hearing, Rosemary Collier, 39, of no fixed abode, admitted one count of misconduct in a public office in her work as police support staff.
The judge Richard Marks QC adjourned for pre-sentence reports and granted Nunkoo and Collier unconditional bail.
But he warned the pair that "all sentencing options will remain open".
They are expected to be sentenced on a date to be fixed next year.